> If the person reading the code doesn't quickly understand what's going on from the name or finds the name confusing, the name is poor and should be changed.

I used to think that way, but in many nontrivial circumstances, every conceivable name will be a mismatch for where some person is coming from, and not be self-evident for their mental model. Even the same person, over a longer time span. There is often a gap to bridge from name to meaning, and a comment isn’t the worst way to bridge it.