A co-worker had the hypothesis that it (being more prone to anger/aggression) is because your car is like an extension of your house, in a way it's a bit like your moving home, so you feel more vulnerable and it makes you much more nervous about everything outside of it.

This explanation makes sense for me, but I never liked driving so who knows.

Very surprised that A blind legend didn’t make it here, among all those suggestions.

What do downvotes do, exactly ?

What would be the alternative ?

By you, into upvoting