Self-diagnosed here.
Getting an "official" diagnosis would NOT help me at this point. I am not looking for services, nor validation from anyone else--I know what I am/have. AS just "makes sense", and that's enough of a "relief" (or "jackpot" ) for me.
Also, as someone else pointed out, having it on my record might cause more problems than it solved. I have two decent jobs, and would like to hold onto them.
Finally: I am female, and over 30. It might not even be POSSIBLE now.
To answer the question in a general sense: IMO, it is only "important" if you actually need services/help. Some of you have said that a medical diagnosis is the only way you would truly feel "validated"--that you're not just "imagining things" or "making it up." All valid considerations. I have had people in my life who saw it before I did, and people who insisted that it wasn't true--someone actually had the gall to say "You have none of the symptoms" when she really knew nothing about ASDs at all.
And yes--sometimes, even here, the self-diagnosed are made to feel like they somehow "don't belong". I usually ignore those implications, but that's just me. Considering how many stories there have been from people who were misdiagnosed/told by "professionals" that they don't have it, only to have a later second opinion say that they do, I think I'll go on trusting myself. More reliable (for me), and definitely less expensive.
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The existence of the leader who is wise
is barely known to those he leads.
He acts without unnecessary speech,
so that the people say,
'It happened of its own accord.' -Tao Te Ching, Verse 17