Probably yes, though you do have to bear in mind that not all of those guys were actively playing like superstars at the time.
1993 represents the overlap of:
- late-peak athleticism of the late Baby Boomers (guys born in ‘63 were now 30)
- early-peak athleticism of the early X’ers (guys born in 1971 were now 22)
- the full opening up of the league to former Soviets and other Europeans
- during a period when the former eastern European pro leagues had largely imploded (so no KHL-style competition for talent)
- and this all took place just as the NHL was starting to expand for the first time in a generation so that the talent was mostly stacked onto 21 rosters which got to pad their stats on terrible expansion teams.
It was an absolutely perfect storm and yes, it was probably the NHL’s high water mark for pure concentrated talent on the ice every night.
It's interesting. This argument sounds good on paper. However, doing the actual research, it doesn't seem to ring true in 1993.
I did the research using the materials I have...luckily I collect hockey cards so it's easy to look up every single significant player using my Upper Deck series 1 and 2 sets. (I have this set and many others in 9 pockets in a binder. I'm using the 93-94 set that depicts the 1992-93 NHL season for the regular base cards.
Checking the players who had rookie cards in the early to mid 80s (Back then, Topps/OPC usually gave rookie cards or RCs to players who already played a few seasons so usually their actual NHL rookie season is a couple seasons before, FYI.):
(##-##) is their rookie card, cutting it off at 87-88; the explanation afterward is what they did in 92-93 season or future notable accomplishments, meaning the player is not washed up or in decline
Gretzky (79-80) and Lemieux (85-86) already stated above
John Vanbiesbrouck - Rangers (86-87)
just acquired by Florida, about to be the franchise player there
Russ Courtnall - Dallas (86-87)
Scored 79 points in 92-93, about to go to Vancouver on the first line
Tom Barasso - Penguins (84-85)
43-14-5 3.01 GAA, coming off back to back SC wins 91, 92, 2nd in Vezina voting that year
Patrick Roy - Montreal (86-87)
Won Stanley Cup that year and Conn Smythe with more to come with Avs
Bernie Nicholls - doesn't matter (83-84)
Washed up - notorious for not taking care of his body
Ray Bourque - Bruins (80-81)
79 GP 19 G 63 A 82 PT +33 +-, 2nd in Norris Trophy voting
Scott Stevens - Devils (83-84)
Just entering his prime as the most fearsome defenseman in the NHL with multiple Cups ahead as captain
Pat Lafontaine - Sabres (84-85)
84 GP 53 G 95 A 148 PT 3rd in Hart Trophy voting
Dino Ciccarelli - Red Wings (81-82)
82 GP 41 G 56 A 97 PT, still going strong after years of playing a strong style down low
Kevin Hatcher - Capitals (87-88)
83 GP 34 G 45 A 79 PT 114 PIM +11 +- franchise two-way defenseman who played a strong game, 4th in Norris voting
Kirk Muller - Canadiens (85-86)
80 GP 37 G 57 A 94 PT, won Stanley Cup as a top C for Montreal, career season, points-wise
Grant Fuhr - Sabres (82-83)
illegal substance abuse issues, trying to make a comeback
Mike Vernon - Flames (87-88)
Average stats on a declining Flames team but landed his 5th All Star team so, still well respected
Rick Tocchet - Penguins (87-88)
80 GP 48 G 61 A 109 PT 252 PIM +28 +-, career year as one of the best tough guy seasons of all time...109 pts and 252 PIM
Paul Coffey - Red Wings (81-82)
80 GP 12 G 75 A 87 PT, Traded halfway in the season, would help Detroit to President's Trophy and SCF, and win Norris two years later
Adam Oates - Bruins (87-88)
84 GP 45 G 97A 142 PT, no Brett Hull, almost no Cam Neely, 4th in Hart voting, 2nd Lady Byng, first time scoring 40g
Jari Kurri - Kings (81-82)
82 GP 27 G 60 A 87 PT +19 +-, playing as an excellent 2-way center for LA, helped Kings to first SCF ever
Pat Verbeek - Whalers (84-85)
84 GP 39 G 43 A 82 PT, just Pat Verbeek continuing to do Pat Verbeek things
Ron Francis - Penguins (82-83)
84 GP 24 G 76 A 100 PT, 100 points as 2nd line center, excellent faceoff man, 91, 92 SC champ, future Selke winner and Lady Bing winner
Gary Suter - Flames (86-87)
81 GP 23 G 58 A 81 PT, excellent defenseman on a now bad team, tied for 7th in Norris voting, so still respected
Cam Neely - Bruins (84-85)
injuries, injuries, injuries, the Sandy Koufax of hockey
Larry Murphy - Penguins (81-82)
83 GP 22 G 63 A 85 PT +45 +-, huge career season as no longer just an offensive defenseman, 3rd in Norris
Vincent Damphousse - Montreal (87-88)
84 GP 39 G 58 A 97 PT, excellent offensive season on the first line of the SC Champs
Doug Gilmour - Maple Leafs (84-85)
83 GP 32 G 95 A 127 PT +32 +-, considered a top 3 player in the league this year, 2nd in Hart, Selke winner, excellent playoff run
Steve Yzerman - Red Wings (84-85)
84 GP 58 G 79 A 137 PT +33 +-, his most well-rounded season yet, imagine these numbers w/only being 8th in Hart voting and 0 Selke votes...
Dale Hawerchuk - Jets (82-83)
81 GP 16 G 80 A 96 PT, Hawerchuk still being the offensive force he always has
Luc Robitaille - Kings (87-88)
84 GP 63 G 62 A 125 PT +18 +-, basically having a career season as captain of the Kings, SCF
Al MacInnis - Flames (85-86)
Injury issues but still has a Norris win in the future with many great years in St. Louis
Phil Housley - Jets (83-84)
80 GP 18 G 79 A 97 PT, career year offensively for this offensive defenseman, probably something to do with Selanne, 5th in Norris voting
Also by this time, most of the old guard standouts from like Lanny MacDonald, Larry Robinson or Bryan Trottier were gone in previous seasons.
So either way, the nearly all of the 80s players were excelling or still had great years ahead; and, the 70s standout players were pretty much all retired. Conclusion? It was really the prime players still in their prime with a huge infusion of new talent at all positions coming from every direction/country.