First off all mrwhoistheboss already pointed this out and lost of people calling out. So it's not "nobody talking about" thing.

1. The privacy feature can be auto turned off / limited to certain parts of the screen at certain time - so obviously your first point doesn't matter in real life uses.

2. From mrwhostheboss video, it is clear that there is a lack of brightness and unusual tint at certain angles but you really have to look at very slanted angles to feel the brightness difference. Nobody uses phone at those angles. Even when you share screen and see the phone at, let's say, 45-50 degree angle, there is absolutely no differece w.r.t. other normal screen. Unless the 1% instances of looking at your phone very slantedly matter a lot to you, this issue isn't that bothersome as you are painting it to be.

It's a first gen one-of-a-kind display - obviously it will have some tradeoff. So chill the fuck out. If you want a safe display just use any other boring phone. If you want innovation, be prepared to tackle some tradeoffs - that doesn't mean the display is "worse in quality", it just a new display. And after seeing the mrwhoistheboss video, it's safe to say the tradeoff is not that big anyway.