The DSM-5 and ICD-10 don't exist for anybody to just look up and diagnose themselves, they are resources that exist for specialists who have trained extensively in the relevant medical fields, there is decades worth of learned context and reading-between-the-lines involved that you as a layperson are not privy to and each of the listed criteria on the DSM-5 has a threshold of severity that must be met to be considered clinical, you may as well be advising people that they almost certainly have small-cell carcinoma because they looked up their common cold symptoms online and checked off most of the boxes for lung cancer

You are also citing the RAADS-R which has been demonstrated to be a useless means of evaluating the presence of autism, with almost 60% of people who score highly on it not meeting the ASD diagnostic criteria; https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8452438/

Your attitude is entirely American-centric and negates the fact that many people here live in more civilised places with universal healthcare where the issues of class, race and costs are nonexistent

You also use language such as "real autistics" and "gaydar, but for autism" - there is no such thing as an 'autistic gaydar', and even you yourself make a distinction between what's 'really autistic' and what isn't, what you are effectively doing is not only condemning the very important fields of medicine and psychiatry while writing off the reality of autism as a clinical disorder, but you are inviting people to query you so they adjust their behaviours in ways that allows them to justify calling themselves autistic rather than having a professional evaluation conducted, a disgraceful and outright dangerous attitude in every sense