Those remasters I mentioned all sold really well. I think it's important to get out of the general online discourse a bit, Sony's major narrative titles are consitently award winning and sell incredibly well. Playstation on the whole makes several times as much revenue as the Nintendo Switch based on software. There's a major audience for this kind of stuff, and Sony especially has found loads of success in its porting practices. Nintendo obviously cares about performance and visuals, because their next console is going to utilise DLSS. The Nintendo Switch being underpowered is a matter of the form factor and cost when it comes to making a handheld, we know based on the known specs that the next console is going to be basically as beefy as you could expect something in the Switch's size and price range to be.
I also wouldn't want to defend Nintendo entirely there either.
There are many corroborated reports about NOA utilising contractors for a bulk of their work while not treating them properly or giving them adequate working conditions alongside reported union-busting. In fact, specific to Smash, we know for a fact that Ultimate bled through scores of contracted playtesters, forcing them to work late hours with low pay only for them to not end up in the credits of the game,
because one of the accurate Ultimate leaks reported on that and gave the same facts the later article on Axios did. Nintendo in general
has a history of crunch all the way up to Miyamoto's level. It's a good thing that Nintendo has such a low turnover rate, but that number is also probably inflated by how much work is done by contractors who aren't treated right and aren't considered actual employees.
All that is to a say, again, I think a Smash Ultimate port is unlikely and a full installment would be what Nintendo would want to build a marketing campaign around, but I'm making a more broad point about the potential strategy for some Swiitch 2 titles.
Also, I really really really do not know if it makes sense to argue other companies get flack for recycling the same titles and not Nintendo lol.