My opinion is it’s more adults finding partners that are also neurodiverse or autistic and breeding due to internet dating and more opportunities to take employment out of your immediate community. There were naughty out of control children in school in the 80’s and the system forced many out through exclusion and forced more to mask and hide issues massively. I remember fidgety kids and I zoned out a lot, I didn’t look naughty on the face of it. Personally growing up my parents were very authoritarian and physically punished us, so we held it in mostly. As attitudes have changed children are more respected and hitting or smacking is illegal, so children shouldn’t experience having to repress so much to save their lives. On the flip side it part of the metal health crisis as parents cannot control certain children and blame themselves.
Children are born with Autism, parents don’t force iPads on them and they suddenly turn like zombies. I really hate this whole narrative about diet and screen time. Children can be challenging, many may indeed have more screen time than you think ideal, but that can be because they need more decompression time and an experience that is nothing to a “normal” child like going to a shop to buy milk is a big experience for a child with a different way of processing the experience.
I have two children with extremely limited diets and they don’t even like chicken nuggets, they mostly ate everything as babies, I was crunchy as it comes. It just is a stage where they need more control on their diet, or can’t manage certain textures, you cannot do anything, but offer them things, they need to eat. So if it’s a certain crisp, that is always the same in flavor, texture and quantity then so be it, it’s a form of consistency and control in an unpredictable world. It’s not causing it it’s a symptom of it.
I do very occasionally judge other parents of Autistic children ( in my head), because it is sometimes easier not to try things, but I also understand it’s is majorly hard to try things for your child and hard on you when it goes wrong ( and the mental worry even if it goes fine) . So there, parenting is all judgement but at least don’t pedal wrong information.