I'm aware. See for instance, VC Arielle Zuckerberg's comment that when deciding which founders to fund she looks for "a little of the rizz and a little of the tis" with "rizz" referring to charisma and "tis" to autism.
One could argue that mythologizing a particular characteristic is itself a form of stigma.
It's also very much possible for something to be both a stigma and an identity. In fact, the stigmatization can make the identity stronger.