for the sake of comparison, by the age of 25, Blight was playing in Dallas, tearing up the tier II Central Hockey League with his offensive skill, netting 95 points: but he was finished in the NHL.
Gainey at 25 won four Stanley Cups, a Conn Smythe, two Selkes, played in two All-Star games & played for Team Canada at the Canada Cup. Gainey's offensive high in the NHL was 23-24-47 while playing on the checking line; Blight's NHL high was 28-40-68 playing first line & power play minutes. at Blight's best, he only outscored Gainey by 5 goals. Gainey's last 20-goal season was as a 32 year old playing on a line with Guy Carbonneau & Chris Nilan.
in Gainey's rookie year, he was 13th in scoring on the Habs, 17-20-37. the top LW on the expansion Scouts that year was Guy Charron, 13-29-42 [2nd in Scouts scoring], on the Capitals was Denis Dupere 20-15-35 [2nd in Caps scoring], & on the perennial bottom-feeding Seals was one hit wonder Dave Hrechkosy 29-14-43 [3rd in Seals scoring].
there have been plenty of workhorse wingers in hockey history who have been elevated to number one slots, despite lacking offensive gifts, & produced well.
by 1976, the Soviets were calling 22-year old Gainey the smartest hockey player in the world. between his speed & his superior hockey sense, he could've adapted to taking on a more offensive role on a weaker team, if needed. a consistent 15-20 goal 30-45 point 3rd line checking specialist playing first line & power play minutes will undoubtedly be a 30+ 60+ point guy consistently.