Perfectly fine statement to make in a vacuum, but in the real world there are massive hurdles and downsides to getting diagnosed. I’ve interacted with more than one psych who has basically said that of those who have sought an adult diagnosis with him, they’re rarely wrong. Any image you have in your mind of hordes of neurotypical people making up that they’re autistic is based on prejudice, not reality.

There’s also not a single way to determine if someone is on the spectrum; a psych can run a test wrong or make wrong judgements, and a person doesn’t need a degree to know they have sensory meltdowns or can’t keep up socially to save their life. The idea that doctors are the only ones with insight into health (ESPECIALLY mental health) is something best left in the first half of the 20th century.