These apps are not installed by themselves, someone with physical access to the phone is installing them (if we include remote installs then anything that autou

These apps are not installed by themselves, someone with physical access to the phone is installing them (if we include remote installs then anything that autoupdates - including iPhone - can also install software). And it isn't a matter of flexibility, it is a matter of utility: others not being able to take your phone from you and install apps also means you not being able to do it either.