The nonsense I spoke of:

I don't wear glasses so I can't use a glasses mounted mirror.

I get distracted with too much visual information.

The mirror blocks my vision.

I'm more concerned being injured by the mirror than a car.

All I need is my hearing to keep me safe.

Mirrors are necessary in cars because they are different than bikes. The same benefits that mirrors provide in a car don't work for a bike or are not applicable to a bike.

There's plenty more to come I'm sure.