People having these issues is real, it's the severity that's the question. I don't think it's a matter of someone being neurodivergent or not - it's that there

People having these issues is real, it's the severity that's the question. I don't think it's a matter of someone being neurodivergent or not - it's that there is likely a bell curve type distribution on a lot of psychological attributes (how long you can concentrate as an example) and the people at the lowest end of the curve might require some sort of intervention in order to live happy productive lives. There are also going to be a far larger group of people who are merely below average and who find education in particular harder than their peers but who don't qualify for any medical or psychological intervention. I suspect it's this latter group that social media diagnosis appeals to most - if you're not doing as well as you (or your parents) would like then normally you just have to feel stupid/worthless. These (self) diagnosis provide a level of explanation (and therefore comfort). I self-diagnosed myself with mild ADD many years ago and even self-medicated (which in terms of productivity worked well). But meeting people with severe ADHD made me reconsider my alleged issues - sure, I can't concentrate for as long as I'd like but these people couldn't sit still for 15 seconds.