There's no reason to endanger anyone, even if it's only the slightest chance.
Just being out on the road endangers others, by the "slightest chance". There is no situation with zero risk. For example, there's a turn in the road, on a busy street near my home. I've watched so many cars fail to stay in their lane when going through that curve. So, being in the next lane, and completely following the traffic rules, is not sufficient. To reduce risk of an accident, I have to ensure that I'm never adjacent to another vehicle at that point. But, I can't stop someone from being next to me, I can just try to avoid it.
Ok, I'm rambling. The point being, there's no line with risk on one side, and no risk on the other.