The individual whose comments are the subject of the OP is a candidate for the US Presidency making ill informed (almost certainly deliberately ill informed) remarks on transgenderism during political debate between himself and other candidates for the US Presidency.
While I wholeheartedly agree with your comments refuting the ill informed comments on the causes of Transgenderism, the Republican Party and Republican Candidates for the presidency have placed Transgenderism, treatment and rights relating to Transgenderism squarely in the middle of the political debates that surrounds the up coming election.
The issue is absolutely a matter of politics.
I agree it ought not to be, but it undeniably is.
I note too it has crossed into UK politics with PM Sunak making his own unhelpful and ill informed comments.