Not to downplay any difficulties you or someone else may have had, but a counter to this I am seeing some people claim on twitter that they should just be able to state their diagnosis without getting one and want accommodations for it because of poverty or family would look down on it.
This is very dangerous. People just assume they see a characterization on TV and assume they have that. Symptoms can be shared between different classes of syndromes. ADHD and High Functioning Autism both can share, on the surface, similar sensory processing issues, anxiety, and obsessive thinking in my experience; but I imagine the therapy and day to day accommodations that one with ADHD needs is much different that one with Autism (honestly I barely remember the therapy I got in school and I am hoping more people can chime on this).