Do you feel people tend to self diagnose mental issues and use them as fact over getting a professional diagnosis?

I'm especially calling out autism on this one. I feel like too many people, who are just socially awkward, tend to claim they are autistic on their own rather than getting an official diagnosis. What do you think? Are there more people just self diagnosing mental issues rather than seeking a professional test to prove it than those who do?
Do you feel people tend to self diagnose mental issues and use them as fact over getting a professional diagnosis?
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