Is Gender a Social Construct? Excluding one tenth of a percentage is not arbitrary, then? — Echarmion
Nope.
It's not just the transgender movement though. As was pointed out in the OP, the idea is also supported by parts of the feminist movement. — Echarmion
Be that as it may, the transgender activists, whatever labels they place on themselves, at least based off what I've read, push for transgender rights. They do not push for the idea that a lot of cisgendered people out there are actually transgendered, which is what you need to escape the idea that the vast majority of people's gender identity matches their biological sex. That's the base of my argument, there's certainly a biological aspect to gender roles, that's why you see a 99.9% overlap between the two. You're not going to get that sort of overlap with just socialization.
Things are never "true by definition", unless you think definitions can be true or false. If your argument is "true by definition", it just means your constructed your definition in a way to preclude the conclusion - i.e. your argument is circular. — Echarmion
Without getting too far off into the weeds, the "by definition" was describing the true dichotomy created by the terms transgender and cisgender. You're one or the other. If you're not one, by definition you're the other. If you're not married by definition your single and vice versa. The fact that so many more people, "so many more people" being over 1000:1, admit that their gender identity matches their biological sex should tell you all you need to know about how society views sex, gender, and gender roles.
The behaviors that are acceptable expressions of masculinity / feminity have changed a lot over the past, say, 50 years. If you want to look at sports, look at the changed status of female leagues in many traditionally masculine sports. Association football in Europe is one example. 20 years ago, noone cared about the female teams, now at least the international tournaments garner significant media attention.
The position of women in politics has also changed dramatically. So has the status of "stay at home dads" and in general the role model for fatherhood. — Echarmion
As there are outliers with toe counts, whether or not people's gender matches their biological sex, there are outliers with typically male and female traits. Given a large enough population you'll find enough extremely competitive women who have whatever traits are needed to accel at soccer (not too familiar with the sport, especially at a professional level) to create enough teams for competition. But the existence of such a league isn't a reflection on the female population as a whole, that's not evidence of some sort of social shift where women are becoming more and more competitive, or whatever other trait that's traditionally not associated with females.
I understand there are bell curves, and at the extremes you'll see more masculine women and more feminine men. I don't think claiming that gender roles are largely biologically based necessitates ignoring those extremes.