You're still missing the point and you didn't have to expressly state that Orr would be the only one affected. The tone of your posts said as much, like a drop in league scoring would suddenly keep Orr from the Art Ross or drop him from the top 5 in scoring every year when the other players points would drop the same.
It has nothing to do with how high scoring was or how many points Orr got.
He still beat out every other star forward in the league playing under the exact same conditions.
If league scoring was lower then maybe instead of Orr winning the Art Ross in 69/70 120-99, he wins it 110-93 and in 74/75 he wins it 125-117 instead of 135-127.
The bottomline is still a big fat SO WHAT!
He is still the only D-man to win an Art Ross let alone two and still dominated every other star and super star forward in the league playing under the exact same conditions.
End of story.
Just to be clear, I believe that scoring levels at different times would affect all players to a lesser or greater degree, depending on the player and era.
True Orr is the only Dman to ever win a scoring title but to translate that into a Art Ross in 2010 and beyond is pure speculation and a bit of a stretch IMO.
Look generational players like Orr, Gretzky and even Lemieux were all super great talents but they also needed a small element of luck of timing, team and players that played with them to truly excel statistically and dominate.
There are many Dmen in the NHL today that are closer to Orr skill wise than in the time period he played in yet none of them are even close to winning an Art Ross.
The role of Dmen and the game has changed so much in the NHL that even a talent like Orr would have great difficulty in winning an Art Ross never mind being a top scorer IMO.
Green is probably the most gifted offensive Dman who played in the best system and had the best opportunity in the last 10 years and the best he could manage would have been an 3 way for 9th in scoring if he had stayed healthy and maintained his pace.
Green's best is actually a 20th place in 10.
Sure Orr probably could best Green but I'm not confident that he would be breaking the century mark in todays NHL with any regular success even on the perfect team and situation for him..
This is not meant as a slight to Orr but to the reality to the talent level and the way the game is played today and the role of Dmen in that game.