I think a big issue is that some people are so stupid that they think it’s a good idea to protest in the middle of a highway, and especially those who don’t get out of the way when a car isn’t slowing down.
If a car doesn’t slow down when there’s a person in the road, you don’t have to look further than that for the problem. Maybe the person is blind and lost. Maybe they’re trying to escape a rabid porcupine. Maybe they’re sleepwalking. And maybe they’re stupid. But you slow down, even for stupid people.