> Science has shown that there is more than two combinations of X and Y chromosomes. So if you went by chromosomes alone, there's more than two sexes
This undermines the point most "gender positive" people want to make. Yes, there are non XX or XY people, but they're rare compared to XX/XY transgender people. They also tend to have issues like learning disabilities and problems with speech. By conflating transgender people with people with chromosomal irregularities you're establishing a link suggesting XX/XY transgenderism is also a "disorder".
This undermines the point most "gender positive" people want to make. Yes, there are non XX or XY people, but they're rare compared to XX/XY transgender people. They also tend to have issues like learning disabilities and problems with speech. By conflating transgender people with people with chromosomal irregularities you're establishing a link suggesting XX/XY transgenderism is also a "disorder".