[samatman]

You got the question I was responding to backward, it was said that there is absolutely no rational reason why cars should be able to drive above 150km/hr.

"Come up with some reasons why people wouldn't want to drive fast" is trite, boring, I would have ignored it.

Edit to clarify: "Why not" in my reply isn't "Why not drive fast", it's "You say there is no rational reason, why not? Here's one".