"No reason whatsoever" I think you forgot about funding. How would we pay for the infrastructure? Aren't taxes evil? Surely you don't mean people should improve these things for the betterment of society on charity in this capitalist market?

I've been having a rough time with this too as I suffer light sensitivity from a health condition. It does help to look away from the car with the bright lights. I always look at the white line, that way when I look back at the road when they've passed the blind spot that's recovering from the brightness is top left instead of close to the middle of my vision. That's how I was taught as a teen.

Passing someone else in the designated passing lane does not cause traffic and congestion just because you want to go faster than them. They're allowed to pass.