Right. (some) Mental illnesses are when that trait is so severe it causes problems for the person. That trait is something everyone has, but not the mental illness. Mental illness is specifically when that trait is severe. It would be saying everyone has a severe issue to some extent, even if it’s not severe for them. It just doesn’t make sense, and to me weakens what mental illness actually is. If people use adhd to just mean attention issues, even ones so minor they don’t cause a person problems, it undermines the word.

Edit: didn’t mean to delete the parent comment, I accidentally posted twice. It was the same as above in the thread.