Trans people have been around for as long as recorded civilization. I don't have a problem with them, and I believe they are perfectly valid as individuals. But I do believe in the well-established fact that there are significant differences in the way men and women are generally wired, and that those differences exist for valid biological and evolutionary reasons.
I think the whole "gender is a social construct" idea is pretty bogus. There's a reason males tend masculine and females tend feminine, both of which tie directly in to the biological and evolutionary reasons mentioned above.
On the flip side, I understand that, for one reason or another, whether it be exposure to various hormones in the womb, genetics, or whatever, that some biological males display a varying degree of feminine characteristics and some biological females display a varying degree of masculine characteristics. I do not believe, however, that it means a biological man is a woman or a biological woman is a man just because he or she displays such characteristics. I will still respect their chosen pronouns. I will still support their right to live as they so choose, because I am not an *******. But I do not believe that a transwoman is the same thing as a woman or a trans man is the same thing as a man.
Even as politically progressive as I am, in some circles on the far left, that gets me labeled a hateful bigot or transphobe. I have grown to not care much, as those words have become so overused that they are essentially meaningless anymore. I can understand why the lack of nuance from tankies and leftists on this issue is off-putting to conservatives, especially as a biological dude is dominating women's swimming, but I think the "trans issue" is generally way overblown by both sides.