There is survivorship bias at play as well. Theres people who go in and DONT get diagnosed with ASD, but get found out to be having other issues, ranging from

There is survivorship bias at play as well. Theres people who go in and DONT get diagnosed with ASD, but get found out to be having other issues, ranging from endocrine to trauma. The evidence for treatment is the improvement in quality of life for people who do manage to get help. The control would be people whose challenges make their lives, and the lives of those around them, harder.