Do you know anything at all about the assessment process for autism? Because it doesn't sound like you do. You seem to think parents just ask for it and it's given to them and they unlock the gates to a magical land full of money trees and endless amounts of help and support that neurotypicals don't get.
My son is going through the process now so let me enlighten you to what it takes.
3+ year wait. A 90 minute interview between my son and an assessor. Then I will be having a THREE HOUR interview with a different assessor. Then I'll have to have another 30 minute call after that to summarise and find out the diagnosis. I was asked to fill in about 100 questions, with up to 5000 characters available for some of the questions, to write about all the ways that his neurodivergency negatively affects his life (that was really fucking fun to write, i can tell you). His teachers were asked to complete questionnaires to ensure he shows these signs across at least 2 different settings. I had to upload medical records and occupational and psychological therapists reports, but first i had to go and get those things so that was more time and effort.
Then, those experts get the evidence together and they'll decide whether my child has autism. If they say no, i don't get any support. If they say yes, i don't get any support. Maybe they'll give me a leaflet. Nothing changes.
Why the fuck would anyone put themselves through that if they didn't believe their child needed it?
Also, what financial support can i get if he's diagnosed? Id fucking love to know. Because nobody's offered us any help or support, financial or otherwise at any point in his life, and he's 9. So please, pray tell, i need to know. DLA i suppose, but that's a pittance compared to the actual cost of raising a disabled child. And it's nearly impossible to actually get.