If I said it's natural that girls should cook, clean and have babies and boys should play with trucks and become loggers or fishermen, I'd be chastised and schooled about social constructs.
If I said society has a role in homosexuality or transgenderism, I'd be chastised for not recognizing that these things are natural.
BTW - If sex and gender are two different things, why do transgenders always want to change their sex?