> No, I don't think you have the inerhent right to install any apk you desire, if their OS is designed to prohibit it. You should be free to try to alter their OS any way you want, but they should not have to make it easy.

> And the argument is the same lower down the stack. You shouldn't be able to tell someone how to design their firmware.

Earlier, you claimed,

> They should be able to install any software they want.

but it sounds like actually you only mean that users should be allowed to futilely attempt it, not that there should actually be allowed to run software at will. If the firmware only allows running a signed OS, and that OS only allows running approved apps, then the user is not able to install any software they want.