While all of those may be true, in practice few if any of them matter, for two simple reasons:
- Humans are the bottleneck
- Mirrors can only reflect what's around them...both for better or worse
A pitch black reflection of pitch black surroundings isn't useful, regardless of how clear it is, but a night vision display is able to enhance our ability to perceive the world around us, making it immensely more useful. Likewise, in low contrast conditions mirrors have failed me on numerous occasions (e.g. seeing gray cars on the highway during a torrential downpour), whereas displays can be made to enhance the contrast of the surroundings or overlay a highlight on nearby objects.
Again and again as we go through the details you listed out, the limiting factor is the fact that humans are still involved. Our eyes aren't great and we're woefully error prone. I mean, the majority of people adjust their mirrors incorrectly, providing them with suboptimal views, but even among those who do it right, a casual bump by a passerby in a parking lot, a pothole in the road, or a second driver who uses the car can put their mirror into a failure mode requiring a reset by the user. Moreover, mirrors require looking entirely away from the road ahead, can't adapt easily to show you the best angles in different situations, and can only reflect what's visible around you, which sometimes isn't enough.
Which isn't to say that cameras and screens are the best choice in all situations. If you frequently submerge your vehicle, a mirror may very well be a better choice, in much the same way that you'd also want a snorkel for your air intake. But those sorts of conditions are atypical, so they don't serve as a solid basis for arguing that either snorkels or mirrors should be a standard feature on cars.
At the end of the day, for typical conditions (whether good and bad), we are more of a limiting factor than anything else we're talking about. In good conditions you don't stand to gain from any of the benefits you've enumerated, and in bad conditions you suffer from the fact that mirrors do nothing to enhance our abilities. They merely reflect the world around us, whereas a display can show you things you can't see.