Want to renovate and change your home that you own? You need permitting and not all changes are allowed. But you own the home and land so why do you need permitting?
Say you want to modify your car that you own, again depending on the modification that's technically not allowed either (an aerodynamic wing in a place like Japan, for instance, can't be certain dimensions; but if you own the car you should be able to do what you want with it).
Maybe none of these types of things should be beholden to someone holding the reins of the thing you own but it's not like Apple not allowing sideloading is some wholly unique problem.