I don't care that enhanced Bitrate is premium only. I do care that you still need to click "advanced resolution settings" to access this even for premium users on mobile.
And even if you select high resolution preferred in settings, they will absolutely serve that shit at a low resolution forcing you to manually select the resolution every damn time.
Yes YouTube my connection is absolutely fast enough to watch at the max resolution you can serve, don't pretend it's my connection to cover for your intentional bumping down in resolution.
The speed at which you are connected to the internet via your ISP is only part of the path to youtube's content servers. You could easily have a fast connection to an ISP with a congested uplink, you could be located a long way from the nearest google CDN, or that CDN could be overloaded.
You aren't wrong in the bigger picture, but the fact that I can change to the highest resolution and I get essentially 0 buffer time and it just automatically starts playing at the higher resolution tells me that the bandwidth is there between my device and whatever server I end up connected to that is hosting the data. Otherwise I would likely have a slight delay of a few seconds for it to buffer as it pulls down the data.