Another guy who can't seem to grasp the forward dynamics of this problem.
Nobody is forcing you to side load today under the circumstances under which side loading does not exist, but the circumstances will be different when it becomes an option for developers. Major apps that thrive on harvesting user data won't offer their apps in the App Store where they can't exploit user data. That's fine until it's a Google app or another must have app that you're required for work or to fit in your social circle.
If you use an Android phone or tablet and buy a new DJI drone you have to side-load the DJI app if you want to use it. You aren't "forced" but you also don't have the choice of not side-loading it if you want to use the drone with your phone. A lot has been said about most developers not forcing side-loading on Android, but they regard iOS as the goose that lays the golden eggs and don't want to poison public opinion on the matter and give Apple even more ammunition before public policy is decided. You can bet companies like Meta will ditch the app stores on both platforms the very moment they are able to just to get out from under Apple's (and Google's) privacy restrictions which they consider detrimental to their business.