It's just not that hot of a take, sorry.
The Cup is so hard to win precisely because the same teams win it over and over again. The Devils profile as one of those teams over the next decade.
From 1991-2021, a 30 year sample, 19 different teams won the Cup (counting 10+ year gaps by the same franchise as different teams) and 9 of those 19 won it again. Winning multiple Cups isn't uncommon if you're in the upper echelon, and you're making it sound like it's impossible. It's impossible for teams who aren't good!
If you're likely to win the Cup, which you said is fair, you're likely to win Cups, plural.
You gave a perfect example. The Giants are 1-3 and their QB is getting rushed on half of his snaps. They suck and have an all-time bad offensive line. I'll eat my cat if they win one anytime soon.
If somebody said the Chiefs are probably a multi-time winner in 2018, it would have been freezing cold take. It's going to be hard to win the Superbowl in the next several years because the Chiefs are probably hoovering up a couple more. Every sport is haves and have-nots.