I think it's motivated reasoning. People don't want to write them and it's difficult to put yourself in the mind of someone else and try to anticipate what issu

I think it's motivated reasoning. People don't want to write them and it's difficult to put yourself in the mind of someone else and try to anticipate what issues they could have reading your code. You understand it, it seems obvious to you, therefor it doesn't need comments, which just so happen not to be enjoyable to write.