Profiles don't work well on Apple TVs at all though. You choose a profile on the device, and then you still have to choose a profile whenever you launch any given streaming app as well. I don't know what changing profiles on an Apple TV actually does.

In my household we have two Apple TVs sitting next to each other, and two remotes with the names of my partner and mine on them as most apps don't properly support profiles so that's the easiest solution. If they do that so people buy more devices...it's definitely working.