Blind spots

[peekay]

I use the screen for parking to make sure I don't scratch the wheels or park too far away from side walk. The yellow guideline is great for that purpose.
And it's also useful when your passenger is blocking your right mirror (a few times I had to yell "move you head away") or having things blocking the right shoulder view.

It's not comparable. You don't spend seconds in looking over your shoulder, it's like a quick glance. You still use your mirror but the glance is the final check to make sure everything is ok.
And during that time you're alert and well aware of you're driving and hand still el.
Unlike texting you literally give up your driving mind into something else.​

Looking over your shoulder is not as bad as texting, but nevertheless, both are bad. A moment over your shoulder may not matter much if you're driving in the suburbs or country. But try doing that in downtown LA, where the car in front of you can slam on his brakes at any moment, and you'll realize that fractions of seconds matter.

You should try blind spot mirrors. No matter how good you are now, you'll become a better driver with them.