I don't see how the schools are relevant, because parents tell children how to dress and what they can say too. Children have very limited legal rights. But we're not children, and I'm tired of Apple treating us like children.
As for homeowners associations and cities, it's important to note that the residents of those have a vote, whereas Apple users have no vote over how their devices work. (Only Apple shareholders have a vote.) Someone is going to respond "you vote with your wallet", but that's not the same. With Apple, your only choice is "love it or leave it". Whereas in a democratic organization with voting, you have the option to stay and still change how the system works.
Let Apple users vote! I'm all for that.
I think it's less that "there are going to be issues" and more that people fear that there will be issues, and vote to remove what they think of as a threat.
The instant you let someone plant azaleas instead of tulips there are going to be issues that most would prefer to have prevented in the first place.