Doesn't Verizon lock down all their phones against sideloading? Doesn't do much good for google to allow something if everyone else is still allowed to do the s

Doesn't Verizon lock down all their phones against sideloading? Doesn't do much good for google to allow something if everyone else is still allowed to do the same. The user needs to be able to download from the web like any windows/linux/mac app. Security and curation are no excuse for preventing it.