I probably wouldn't mind having autism in a more primitive society, like an agrarian or early industrial one, but today in modern society I hate it. Our supposedly enlightened, advanced civilization values brown nosing one's "superiors", who are superior due largely to their luck in being born to the existing elite, and climbing the social ladder, and "knowing one's place", above all else. All this requires advanced social skills and an ability to intuitively "read" people, which auties don't have. So, we're outcasts, even among outcasts.
In an agricultural society, we were likely the "bachelor farmers" that are occasionally mentioned in the accounts of early English settlements in America. In that world, it was of utmost importance to have kids so as to pass on one's farm to them. The "bachelor farmer" shouldn't have existed, but he pops up again and again in the old texts. Some scholars have suggested that the bachelors may have been homosexual, but never marrying would have simply made their community suspicious, and besides even in our world homosexual males often make a point of marrying and having kids to try and fool people. The more likely thing is that they were autistic. In an industrial society, an autie would have been valued by capitalists because he would be less likely to socialize with the other workers and from there be drawn into union/communist organizations.
Even further back, in a hunter-gatherer society we would have been the most valued hunters for our ability to hunt prey for weeks on end away from the social interaction of the clan in the caves back home. This may be why so many more boys than girls have autism, males were the hunters who brought meat back to the clan, and for a nomadic hunter the ability to follow prey for weeks on end is quite valuable.
And then there's the shamans of ancient pre-monotheistic civilizations. Didn't you say that your dad is some sort of shaman in your Native American tribe in Canada? Have you considered learning your tribe's ancient beliefs from him? I've heard time and again how people's native beliefs keep being demolished in favor of (usually) Christianity. I once read a newspaper article about a Hmong (refugees from Laos, their leaders made the mistake of supporting the USA during the Vietnam War) shaman and he was lamenting that nobody in his community cares about their ancient beliefs anymore, the missionaries have turned them all into fundamentalist Christians who keep harassing non-Christian Hmong about accepting Jesus so they won't burn in Hell. Ancient beliefs are being destroyed around the world and people being railroaded into Christianity and Islam. Maybe you could find purpose in preserving your tribe's ancient ways. That's more purpose than I'll ever have-my parents (mom especially) were members of a cult. Ugh.