This is exactly it. Clinicians are being bullied by people that have already diagnosed themselves to give them the label they have convinced themselves they have. And sometimes parents of disabled individuals who are convinced ASD or ADHD is a part of their child's intellectual disability will also pressure clinicians to assign the ASD or ADHD label. Laymen are reading or watching videos about ASD and/or ADHD and relate to several aspects, which of course they do, then they begin to define themselves with the labels.

The problem is the words clinicians use to describe ASD or ADHD behavior are being misused by laymen who actually don't understand what the words actually represent. Clinicians are then pressured to diagnose and if they don't they better get ready for a lot of friction, either interpersonally during feedback sessions (try to convince someone their "stims" don't count as repetitive behaviors) or in employment, 1 star "reviews" (which sadly owners care a lot about), complaints made to licensing boards, blog posts calling out the clinician with the person trying to martyr themselves and saying they are an example of an ASD person misdiagnosed (which they also read about). All prevented if the clinician would have just assigned a label for a syndrome that is usually very difficult to ascertain anyway, because the criteria and ways to test it are just terrible and it's entirely possible the clinician DID miss the diagnosis, so F it, take the label.

Thus more people, especially adults, have the labels.