And yes, I think not being able to put an app on a device that I paid for is dystopian. I also think not being allowed to repair my own devices is dystopian, too.
If no device had ever prevented a user from installing their own home-made apps, "side-loading" would never have become a thing.
For gaming consoles, I was vaguely uneased by it at first, but quickly got over it because it had always been that way. I never had a chance to put my own game on a game console.
But with general-use computers, including mobile phones, the whole idea really bothers me. I PDAs and brick phones had never allowed people to write their own apps, I might be less bothered by it. But (thankfully!) they did. That cat's out of the bag, and long ago.
Even Google's attempts to prevent "sideloading" bother me at this point. Any warning that applies to side-loaded apps should also apply to store-installed apps because they have shown they aren't foolproof.