They also refuse to buffer properly. Tiny latency spike or brief packet loss? Enjoy 480p video for the next minute or so because it downgraded automatically and there is no way to force it back.
If my network can maintain more bandwidth than needed for 1080p/4k most of the time (which it can) then there is no reason it should ever fall back to lower quality due to a short blip because you can keep several seconds (or minutes) of buffer.
For example I never have this problem on Youtube. Only Netflix.
If they can't make it work with 1/10th of that, that is their problem, not mine.
I would more prefer it would buffer more so it doesn't need to do either.