I agree with your points, which is why when the replacement device arrives, and if it's in worse shape than the one I have right now, I'm just gonna tell Apple to take back the replacement and forget about it.I totally understand that argument but the exchange game is a total gamble. You can end up with the same display issues, worse display issues, loose buttons, scratches and other hardware faults...plus you have to go through all the backups & setting up multiple new phones.
My 'pressure point' is very minor and preferential when compared to yellow screens or uneven backlighting. However, if it is going to get worse or cause complete display failure somewhere down the line then that's a different matter.