Ovy is a top 10 player of all time. Kucherov is a top 100 player of all time. Big difference.
Ovechkin is the Kobe Bryant of hockey
He scored more than anyone else because he shot way, way more than anyone else, but his overall impact/value to his team over the majority of his career hasn't been at a level that warrants consideration as a top 10 player of all-time
He has just 1 Art Ross, and while he did lead the league in points-per-game 3x, in 2 of those seasons he was only .01 points ahead. Crosby in '08, and then Malkin in '09
In 2010, Ovechkin set his career high in points-per-game with 1.51, which finished 1st in the league ahead of Henrik Sedin's mark of 1.37
Malkin, Kane, and Kucherov all lead the league by at least .20 during their career years, so shouldn't a top 10 player of all-time be able to out-produce Henrik Sedin by more than .14 PPG?
Crosby has seasons where he lead the league by .31, .34, .23
From age 26 - 35, Ovechkin had 706 points in 722 games, winning 7 Richard trophies, but he was also -13 over that span despite being on a playoff team in 9 of those 10 seasons
Now compare that to the production that other stars had during that age range:
From 26 - 35, Crosby had 802 points in 686 games while being +102
From 26 - 35, Jagr had 864 points in 692 games while being +129
From 27 - 36, Datsyuk had 715 points in 684 games while being +220
From 26 - 35, Thornton had 838 points in 776 games while being +149
From 26 - 36, Sakic had 863 points in 729 games while being +139
From 26 - 34, Forsberg had 445 points in 362 games while being +135
It just doesn't make sense that a top 10 player of all-time would go entire decade in the middle of his career producing below a point-per-game and having a negative +/-
In baseball, being one of the best HR hitters of all-time doesn't mean one is automatically one of the best players ever
The same rationale applies to goal scoring in hockey...
Ovechkin may be a top 10 goal scorer of all-time, but he's not a top 10
player of all-time