Yeah, realistically the problems almost never happen and hopefully become rarer over time.

The typical human preference WRT the trolly problem ("don't take an action which leads to deaths, even if it would save more lives") is also a reasonable -- maybe the only reasonable answer -- to these hypotheticals.

Ie, move against the light to avoid getting rear ended, but not if you're going to run over a pedestrian or cause an accident with another vehicle trying to do so. (Even if getting rear ended would push you into the pedestrian or other car.)