The short answer is because autism is different from sexuality and the same system that works for one will not work for the other.
I would actually caution against embracing any label as part of your identity because as you have observed the autism experience is universally different. So too is the gay or lesbian or transgender experience. These are words we use to describe aspects of ourselves, but too often come to define us instead and enable exclusionary behavior such as gatekeeping identity or depening isolation for anyone who doesn't fit neatly into a label.
Capitalists also say "You'll own nothing and be happy", the part they leave out is that it's because you will rent every from them. In filthy socialism, the state holds everything in trust for the people and nobody makes any profits from ownership (the true power of capital).