I have a formal ASD/autism diagnosis (not Aspergers) and I am firmly in the #SelfDxIsValid camp.
I was never self-dx. I would never have thought to look into being Autistic or seeking an evaluation except that someone who knows me VERY well & has Autistic kids suggested it.
I only had one evaluation (no "doctor shopping") and I easily easily easily got my autism diagnosis because I am THAT obviously and stereotypically Autistic.
AND it was 100% a privilege that I got that evaluation and diagnosis.