“The fact that I was born with congenital heart disease means that any time, at random, without warning, one of my valves or part of my heart muscles can suddenly collapse or disintegrate. I would be dead within a matter of days or weeks. Only annual checkups can help find the smallest of hints to prevent this.”
It only helps to a degree. Takes only 1 idiot to speed through a red light and it's over.
I also don't tail gate; look both ways when crossing a one way street; check that there aren't any cars coming if I'm about to walk past a big rain puddle, etcetera etcetera.