People can change sex for the most part. Your statement would only be factually true if you were only referring to the chromosomal aspect of sex, which I am sure you know. Lots of medical procedures out there have been reprioritised in the face of COVID-19. Despite your desire to view the world in black-and-white terms, which is patently absurd, the reality is that some medical, therapeutic and life-saving treatments now have higher priority than other medical, therapeutic and life-saving treatments.