No.Sounds like you'd be happier with a non-Apple, non-iOS device.
One you can "sideload" an app to find you places that sell avocado toast and switchel in a smug (I meant mug).
But I understand what you mean: why can't I buy a new F-150 with a 3.5L twin-turbo engine, and then install a Dodge Ram transmission---with the warranty still intact and protected by Ford?
Deep thoughts for a Thursday, I'll tell ya.
You see, I like EVERYTHING ELSE about Apple hardware and software. The way the UI works, the feel of the hardware, the reliability and quality. I don't LIKE Android devices.
It's a tradeoff right now; I like Apple devices so much more than Android that I'm willing to PUT UP WITH the inability to sideload easily to use Apple devices. I'd rather not have to put up with that and be able to sideload too.
People love to say "Just switch to Android" is if there aren't about a hundred other things about the Apple platform that I DO like and don't want to give up. Sideloading is something that would only affect users who decide to sideload; everyone else who wants to stick with the App Store can do so.