Why do psychologists ignore the facts? We are animals! What are Autistic (and typical) children trying to tell us about modern environments? That these environments are STRESSFUL for children; humans evolved in stimulating NATURAL environments, not in restrictive, violent, emotionally barren and anxiety-driven social prisons.
If an animal is prevented from performing its “natural behaviors” it will invent abnormal compulsive behaviors to stimulate itself. Modern environments are ABNORMAL.