Could you ever imagine Gretzky, Lemieux, Crosby, McDavid, Jagr, Lafleur etc having 65 points in 78 games dead smack in the middle of their prime (26 years old) while perfectly heathy?
Those are the forwards you are looking at in top 10 contention.
Ovechkin hit 90 points once after the age of 24.
In the context of this conversation he is a mediocre point producer. And I really do love Ovechkin.
"Could you ever imagine Gretzky, Lemieux, Crosby, McDavid, Jagr, Lafleur etc having 65 points in 78 games dead smack in the middle of their prime (26 years old) while perfectly heathy?"
Gretzky/Lemieux (and likely Mcdavid) are so far ahead of the players in that 6-10 range that it's useless to use them as a benchmark. And as has been pointed out, Howe and Jagr had some bad seasons too. Even look at Lafleur from ages 20/21/22 - he wasn't even close to an elite player those 3 first years, but it's silly to actually hold that against him.
"Ovechkin hit 90 points once after the age of 24."
You do realize that Ovechkin played in the DPE2.0 after the age of 24 right?
-> 2011 = 85 points and finished 7th in points. 90 points would have put him at 6th place
-> 2012 = Ovechkins career down-year, but 90 points would have put him in 4th place in points
-> 2013 = lockout season, Ovechkin finishes 3rd in points (96 point pace)
-> 2014 = Ovechkin finishes 8th in points. 90 points would have put him 2nd place
-> 2015 = Ovechkin finishes 4th in points. 90 points would have put him in 1st place.
So from ages 25-29, Ovechkin plays in extremely low scoring environments, has a lockout (where he had the best season of all forwards - although Crosby was the best player), wins 3 straight rockets, and has 4 great point finishes (all while being the best goal scorer).
Then Ovechkin turns 30 (which is when most elite players start to decline anyways.
-> 2016 = 1st in goals and 15th in points (which is fantastic for a 30 year old). 90 points would have put him 2nd in points.
-> 2017 = another down year (but Ovechkin still finishes 13th in goals and 20th in points - which is great for a 31 year old). 90 points would have finished 2nd place
By now Ovechkin is 32 years old, and league scoring increases again.
-> 2018 = 1st in goals, 11th in points with 87
-> 2019 = 89 points (1 off, and missed 1 game - who cares?)
As you can see, your comment about 90 points lacks a ton of context.
"In the context of this conversation he is a mediocre point producer."
-> In the context of the NHL (and substantiated by all of the stats on his points, adjusted points, point/gp leads, # of times in top-20 in points), Ovechkin is one of the best point producers of all-time. While also being the best goal-scorer of all-time. Ovechkin adding 2-3 more Rosses would be the difference from a top 6-10 player off all-time and a top-4 player of all-time.