It seems we're largely on the same page. I would point out though, sometimes those seemingly minor tweaks can be pretty important; they're not always at the level of typos in a book.

One that affected me personally was in Pokemon XY, where if you saved in the wrong spot it would corrupt your entire save. As a kid it was a pretty memorable experience to lose ~20 hours of playtime on my Christmas present because I assumed the updates weren't important. Granted, day-one bugs that major in first party Nintendo games are rare, but it's not a given that they're irrelevant either. It can go either way.