Not disputing that, I'm just saying if you were to unleash some of today's best players in an era as high-scoring as Gretzky's prime scoring years, I'll bet their totals would be a lot more numerically comparable. Even Lemieux, who had early injury troubles and played on a much worse team for the first chunk of his career, probably could have approached similar heights if not surpassed them with some better luck. (And circling back, the fact that Ovechkin even gets into this discussion playing in the dead-puck era after goaltenders figured out how to tend goal is pretty remarkable. How many does that guy score if his career begins in 1979, even adjusting for training, diet, equipment, etc.?)
For the record, if it's somehow possible, I feel Lemieux actually gets a bit underrated historically. Apart from the above (I mean, he put up 199 points on an 87-point team), the mere fact that he took three years off hockey, comes back and still stars is pretty crazy. I mean, some of us were already on HF when Näslund and Forsberg were duking it out for the Art Ross in 2002-03, and I had basically zero recollection that 37-year old Lemieux put up 91 points that year and finished 8th in league scoring on an awful Penguins team.