I understand completely, and there's probably a good part of it explained by peoples space awareness turning off when they're around their kids. If I had a haypenny for every time someone walked their doublewide stroller into me, forget about it.

But people do it everywhere. Elevators, stairs, bars. Ants do it for a reason.

https://www.youtube.com/watch?v=aiNEORy0Krc

People do too but if they aren't aware enough to move out of the way, it might tell you what part of the brain those people are operating with.