Are symptoms not the sole means of diagnosis? So if girls present less symptoms then aren't they therefore less autistic? Or, alternatively, if they present different symptoms then perhaps they have something else?
I pretty much do on this site, for sure; it's relevant to everything political or cultural. (They've chosen potential population collapse over assured population replacement.)
I also wonder about stuff like this. I think some things are just a bridge-too-far for organisms to evolve protections against. For instance, are we worried about using too much bleach? Or stepping on cockroaches?