I agree with Kraftie and Ezra. I was diagnosed level 1, but these days I think (and have had it indicated to me by at least one service provider) that I'm closer to level 2, that is, "moderate autism". I've been using the internet extensively since I was seven or eight, and I can say unequivocally that it has absolutely been an invaluable resource to me. It taught me about autism when I was first introduced to the idea of having it; it gave me all sorts of coping strategies that I've found very effective; it even got me in touch with the people who diagnosed me.
That said, there is absolutely no way that I would be able to function without any support beyond the internet. I have a therapist, job coaches, an occupational therapist, a psychiatrist, medication, Medicaid, extensive job accommodations, and support from family members, and soon in-home service providers to go grocery shopping, feed myself, cook and clean. I feel like if the only thing a person needs for support is the internet, then their disability isn't substantial enough to warrant a diagnosis. A critical piece of the autism diagnosis which is non-negotiable, is that the person has to require at a minimum some form of support that helps to mitigate the difficulty they experience as a result of their symptoms. Beyond providing a way to connect socially with others, the internet really doesn't provide much in the way of functional supports.
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"Survival is insufficient" - Seven of Nine
Diagnosed with ASD level 1 on the 10th of April, 2014
Rediagnosed with ASD level 2 on the 4th of May, 2019
Thanks to Olympiadis for my fantastic avatar!