There is a bit of a "Secondary PP assist accumulator" and "elite team/linemates" air to his regular season and playoff numbers before last season which was likely reflected in his Conn Smythe consideration in '20 and '21.
Last season he lead the league in ES points and was 60% clear of the 2nd place scorer on his team so perhaps he put that narrative to bed.
I still think he is a rich man's Kane rather than a poor man's Ovechkin or Jagr.
Generally, the best point producers tend to also be the highest secondary assist accumulators, so I don't put much stock into that.
As far as elite linemates go, yeah no denying throughout his career he's been in a more ideal situation than most. But he has also handedly outproduced his teammates beyond just this year.
Here's his gap over the 2nd best scorer on his team throughout the years.
2016-17.
13 more points than 2nd best, 32 more points than 3rd best.
2017-18
14 more points than 2nd best, 34 more points than 3rd.
2018-19
30 more points than 2nd best
2019-20
19 more points than 2nd best
2022-23
18 more points than 2nd best
Obviously a far cry from the 54 point gap he had over his teammates this year, but I think at this point Kucherov deserves the benefit of the doubt. He's been the straw that stirs the drink for a while now, and the only time he's been outproduced since 2016 was when he was injured.
But I actually do agree with your description of a rich man's Kane.. though to me that's the same different to a poor man's Ovi/Jagr. Even just 1 more art Ross Trophy (as I said in previous post, unlikely) and he's in Lafleur territory, who is also not that far apart from Jagr and Ovi.