You should be charitable with the way you interpret what people say. That person probably meant "e.g. gangs." I find it frustrating how combative people are when discussing anything on the fringes of what is socially acceptable to say.

Gangs may not be the best example, but your interpretation is a mangled version of what op actually said. Clearly we don't know the long term ramifications of these changes. And we're sprinting towards these changes at high speed and acting like we know everything we need to know about gender. We don't.

We don't know whether it's merely a social construction or something deeper. And if it turns out to be something deeper, then we run the risk of fucking up a generation of kids.

That was a poor attempt at argument by ridicule. You didn't actually address anything I said.