Unless you have more data to back it up than a single study made in Mexico, you don't have much data to back up your point with. Studies can often have biases, so one study alone doesn't exactly prove a lot. I'm sure there are plenty of studies concluding the opposite.

And why does anything matter at all? Besides the biological processes in your body being different. Being a specific sex/gender doesn't require you to act a certain way, you can literally do anything you want. I just think it's wrong to differentiate sex and gender.

By quoting wikipedia:

Some people maintain that the word sex should be reserved for reference to the biological aspects of being male or female or to sexual activity, and that the word gender should be used only to refer to sociocultural roles. ... In some situations this distinction avoids ambiguity, as in gender research, which is clear in a way that sex research is not. The distinction can be problematic, however. Linguistically, there isn't any real difference between gender bias and sex bias, and it may seem contrived to insist that sex is incorrect in this instance.

I am certainly not the only one disputing this.