Yeah, when you back into a parking spot, is there traffic moving around in it? How about when you back out, are you backing into a lane of travel? To me, that’s the logic.

When you back in, you are already occupying a lane of travel, and therefore you have some modicum of control over it. Ideally, what I would love to see are angled parking spots intended for backing in, it is the true superior parking configuration, but falls to an opposition that is afraid to back into parking spots, but has no problem backing into a lane of travel.