It seems that people forget that while medical terms do enter the vernacular, medicine also appropriates common terms and gives them specific, narrower definitions.

In the former, those terms do lose some of their specificity and should be considered shorthands for "what feels like [ADHD, autism, depression...]".

In other words, language is a flexible, living thing, and interpretation can obly be done in context.

This is why some of these statements sound so much worse when typed out on the internet, as they are missing any and all emotional cues coming from visual and audio communication.

It happens in other areas as well ("cloud" in IT or "space" in math).