EDIT: please, if you don’t agree with the arguments in the video, come in and discuss, don’t just downvote the thread.
I found this video with many arguments supporting self-diagnosis validity and wanted to share.
Main point may be that there is no valid reason to look for a self-diangosis than the fact of being autistic, and needing support for that. At least until there will be equitable access to medical care, self-diagnosis is the only way for people to understand themself and understand the support they may need in their life.
But, there is much more in the video, take a look at it by yourself!
I won’t repeat what others said, but another point is that some people are desperate at feeling “special” (or serve a narrative where you are not responsible for your failures). By accepting an incorrect self-diagnosis, you can start to mimic autistic traits (even unconsciously) to fit better the label you desperately want to wear.
I have to admit I was too happy and relieved when I started to suspect I was also autistic. It was somehow validating my whole life, and providing me a convenient explanation for all my failures and why I am alone nowadays. But after a while, I realized it was not as simple, and I could just be desperate at finding an external cause to this, rather than objectively trying to determine whether I truly am autistic.
In the end, I realized being autistic or not is not what should matter to me. It shouldn’t change who I am. Instead, it is giving me a direction to follow to improve myself, which is a great improvement compared to before. I can be wrong on my self-diagnosis, but the direction I follow is a good step forward whether I am autistic or not.