There are studies linked in this post that disagree with that logic.

The logic you heard is the long held belief that's being challenged with new evidence, and it takes a super long time to break the medical community of long held beliefs.

For example, even in the 90s medical schools were still teaching that you couldn't get addicted to opioids if you were actually in pain.

And there are still psychiatrists that will say you can't have autism because you can make eye contact with people, because that's what the DSM5 says.