It's not just that. Jagr is always going to win the points-per-game argument - not only because he was the best offensive player, but because Pittsburgh gave him more ES/PP minutes than other superstars could get on teams with depth (which was covered extensively in the Fedorov/Jagr thread).
269 more ES/PP minutes than Forsberg in 1998.
407 more ES/PP minutes than Forsberg in 1999.
I'm not saying that anyone would necessarily steal some of Jagr's Art Ross Trophies (even though Jagr only led points-per-ES/PPTOI once in his Art Ross run), but if his TOI was shaved down to normal levels, those giant gaps disappear and then the two-way players and penalty-killers look comparable. If I recall, 19 of Jagr's points in 1999 were scored after the 55:00 minute mark of the game. Even those dead-tired minutes can add up to big points. So if Jagr wasn't getting them or if someone else was as well, it probably wouldn't look as silly to say that others at their very best were possibly just as good as him those 15 years ago.
I mean, look at their two best seasons:
1999 Jagr: 1.57 points-per-game
2000 Jagr: 1.52 points-per-game
2003 Forsberg: 1.41 points-per-game
2004 Forsberg: 1.41 points-per-game
1999 Jagr: 126 ES/PP points in 2023 ES/PP minutes (point every 16:04)
2000 Jagr: 96 ES/PP points in 1445 ES/PP minutes (point every 15:04)
2003 Forsberg: 106 ES/PP points in 1434 ES/PP minutes (point every 13:32)
2004 Forsberg: 54 ES/PP points in 714 ES/PP minutes (point every 13:14)
Points-per-game makes it look like it's not close, but the point-per-minute numbers are in the favor of the two-way Center.
First, there's a diminishing return aspect to playing more ice time.
Also, why should a player be penalized for playing through injuries? I guess no one told Jagr that his pay, legacy and the team's success were based on per-game and per-minute metrics, not on what he brought to table all season long and over the course of his career.
Second, shall we exchange linemates for the two during those seasons? Would like to see Forsberg win a Ross by 27 with Miller & Hrdina.
Third, Jagr tends to get a lot of third period goals/points. He gets relatively stronger as the game goes on, while his opponents tire from trying to follow, grab, slash, and hit him all game long. Why would one want to discount, nevermind eliminate, points in the late stages of a game?
Fourth, and perhaps most important, Forsberg reached that level for not even 1.5 seasons... and only did so after a full regular season off. Give Jagr or other superstars a full season off, and see how they do the following year. I don't think Jagr's played less than 70 pro hockey games in over 25 years.
The fans of Forsberg, Crosby, Lindros, etc., always resort to their silly "pace" arguments... PPG, Pts/Minute... oh look at what they did for a half season or even almost a whole season and half!... when even that was usually under special circumstances that afforded them more rest than usual... and somehow that translates into them being the better, more valuable player.
Let's face it, Jagr was better offensively than those players. You couldn't and basically still can't get the puck from him. The only difference is then he could blow by you or around you, and now he generally can't. So he played more than just about anyone due to his superior conditioning and also because he was so needed by his team, he kept the puck (and kept it away from the other team) more than just about anyone, and when he had the puck he effectively used it better than just about anyone. No, he wasn't a particularly awesome or committed defender on whole, although he played solid defense in the playoffs.
Forsberg, and those others were sprinters. Jagr is a marathon runner. And hockey is a long, grueling marathon. If it was a sprint, it would be different, and Jagr would probably adapt and prepare/train differently, but it isn't, so he didn't and doesn't.
All this talk about complete game misses the fact that it doesn't necessarily mean more overall effectiveness. If you look at the how Jagr's teams performed with and without him (both in terms of GF/GA and W/L), it's like night and day, as much or more than with/without Lemieux, and certainly more than Forsberg. The Pens didn't have Roy, Sakic, and Bourque and/or Blake. They had Jagr and mostly practically AHL-level castoffs and were just trying to figure out how to pay Jagr and Lemieux (who wasn't even playing most of the time) without going into bankruptcy. So, of course Jagr was playing tons of games and minutes, even through many injuries, because that's how you win Rosses, make the playoffs with weak teams, and keep franchises from moving to Kansas City or going bankrupt.