"But it's true" isn't a good rebuttal to a stereotype that's based on social factors. For instance, "Jewish people are good with money" is a social construct,

"But it's true" isn't a good rebuttal to a stereotype that's based on social factors. For instance, "Jewish people are good with money" is a social construct, caused by the Catholics banning their adherants from working in banks for centuries. There's no inherent difference between groups as far as being able to do the job. It's the result of centuries of social distortions applied to who can do what job. If the social distortions (which still happen today, often propagated by the stereotype itself) ended, the difference would cease to exist. It's important to distinguish the difference between intrinsic differences and socially-constructed differences. And we keep discovering more differences are socially constructed than we had previously thought. Even the idea that men are worse at color perception has a significant social component. That's what the OP was referring to - the social construct caused by telling children that caring about color distinctions isn't a masculine trait. Sure, there's also an intrinsic difference, with color perception having a sex-linked genetic component. That is real. But it's not the entire story, and I'd be wary of making blanket statements that assume the intrinsic property is the only one.