Oof! The point of traffic regulations is to make it clear who has the right of way in any situation, so that everyone knows how to proceed. Politeness (and caution) are oil for edge conditions, where it might be in doubt.
Drivers giving up their right of way can be dangerous, because if anyone else doesn’t realize what’s going on, they could make wrong assumptions.
It’s easy to be mindful and polite to cyclists, but that’s not it.
