Re: I think I disagree, but I’m not sure…
Au contraire, no one is forcing you to enable sideloading on your iPhone.
Saying "just buy an Android" misses the bigger point - smartphones are a duopoly, and a binary choice is rarely really a choice. It's like saying "if you don't like online surveillance, go live in the woods" - there's a lot of possible options that sit in between the two extremes, that for some reason aren't being presented.
Normally, competition would provide those other options, but due to the nature of platforms, we've seen how impossible it is for even a well-funded 3rd option to break through. That's why these companies are called "gatekeepers" - they have enormous power they can use to squash competition. So regulation steps in - the same reason they to had to break up Ma Bell, i.e. "have a phone" vs "not get extorted" is not really a choice.
There's nothing at all forcing you to enable sideloading, on either Android or iOS. You betcha Apple won't make it easy, so you don't have to worry about accidentally enabling it. It's literally an extra choice that people now have that you don't have to exercise if you don't want to.