About the examples, most of them are about general ToS change. There was lot of uproar when Nintendo updated it (just a note that both PS and Xbox has this clause for years, though that doesn’t mean Nintendo is right to add it too), the actual banning news is just one source from reddit.

It is possible there were other cases, but I don’t recall reading any news about it.

Switch 2 game cartridges don’t actually contain games but only download codes

This is partially true. Switch 2 has both Game Key Cards that only have the game license, and also normal cartridges. It’s up to devs and publishers what they use. Cyberpunk 2077 is a big example of game that was fully on cart, and it’s not the only example. Currently though, there are more GKC games then full cart games, but people are vocal about it, so let’s see how it goes.

So, a banned account can play all the games that are fully on cart, as well as all the Switch 1 games, of which about 99.9% (or something like) work on Switch 2, and more are still releasing.

That being said:

that still doesn’t justify a company handicapping a person’s private property without any sort of due process.

I completely agree with this. As they say, better to let 10 guilty escape then let 1 innocent suffer. Nintendo apparently never heard of that.