I am about 99% confident that, had the diagnosis of Asperger's existed 30 years earlier, I would have been diagnosed in childhood.
Instead, I never knew what it was until I was 50 (ok, 49 years, 9 months, and 28 days, if you want to be picky! (and we all know you do! )). I looked it up on a whim one day, and was shocked to find a near perfect description of me - I mean, seeing word for word quotes of ways I have been described, both by myself and others. I've taken all of the tests in the sticky on here, and my results consistently point to Asperger's. Aspie Quiz results 162 / 27 NT; BAP results of 124 aloof, 120 rigid and 107 pragmatic - "Clearly, you are either autistic or on the broader autistic phenotype."; AQ 30; EQ / SQ of "extreme systemizing"; etc.
At this point, I have no intention of seeking a formal diagnosis. Money is part of that - $300 per session, and they don't take insurance. A complete lack of any services for adults is part of it, too. The possibility that it could "negatively impact" my employability comes into play, too. A lot of downsides, and I'm not really seeing an upside, other than deflecting criticism from narrow-minded nitwits like the one referred to by the OP.
Also, how would I know I was getting an accurate evaluation? If I were to get a diagnosis, fine and dandy. I'd finally have a definitive explanation, and professional confirmation of it, for . . . well, everything. But, if they said no, where would I be? Could I trust that diagnosis? If I could see Tony Atwood, or Simon Baron-Cohens, sure. But, realistically, I'm not going to be seeing an internationally recognized expert in the field. After reading so many threads on here about "experts" who actually don't have a clue, I probably wouldn't be able to fully accept a diagnosis (of either yes or no) unless I got the same one from 2 out of 3 shrinks. I see no reason to go to the trouble and expense of seeking a diagnosis to end up no more certain about my condition than I was when I started.
Last but not least is the question of whether I even meet the diagnostic criteria anymore. There is no question that I have many traits (or "symptoms," if you prefer), but I'm not sure that they reach the required level of being "clinically significant impairment" now, although they certainly did when I was 12, or 16, or 23. I think they still do, but even if I'm right - so what? I'd still have to pay large sums of money for any help I was able to find.
Instead, I intend to continue researching the topic myself, looking for ways others have successfully used to minimize the impact of issues they and I share. It just seems to make more sense.
That ended up a good bit longer than I expected. Sorry.