Being autistic is not the worlds most celebrated popular group. Saying you are autistic isn't popular and can actaully have detrimental effects.

People who are autistic are more likely to be turned down for jobs or relationships. They have poorer health outcomes. They don't get treated well by authorities such as police or the legal system. Autistic people are more likely to commit suicide than the general population. Education systems are designed for non autistic people. Even something as simple as going to the shops can be far more difficult if you are autistic.