I don't know why Android OEMs keep thinking they can get away with controversial design choices and high prices as if they were Apple. (not sarcastic :P)
I assume the idea is that most cases will allow the phone to sit flush with the table, and most users use a case (no idea if that last part is actually true).
And honestly it will sit in a stable way, so it's probably not that big a deal in that sense. It getting caught on my pocket would probably be my biggest concern!
The thing I think sucks about this design decision is that I always like to have a phone case with a card sleeve on the back. Seems like the camera band makes such cases inconvenient or maybe even impossible to design.