The devs are there because there is no other option where there are sufficient paying customers.
So in order to have that option, there must be sufficient paying customers, but it can be argued that the paying customers are there because of Apple’s restrictions.
What store? I specifically buy the elderly people in my family iOS devices so that they are restricted to things from Apple’s App Store.
Unless someone came around and showed they have a better track record than Apple, I wouldn’t be interested in changing. But I suspect they would be just as restrictive as Apple is now.
Not worrying about malware and tech support is worth so much in saved time.
So in order to have that option, there must be sufficient paying customers, but it can be argued that the paying customers are there because of Apple’s restrictions.