I always thought that their job was to get involved in arguments over public health.
2. Both Taiwan and China claim to be China, so that statement wasn't even factually wrong.
Taiwan nowadays is kinda forced by China to claim to be China actually.
After all, it is crystal-clear to all right-thinking people that if the world were just, he would currently be in jail. Referring to him as a president is explicitly taking a political position on the subject...
Staying on topic, you grossly misrepresented the situation by characterizing WHO's implicit endorsement of Taiwan's non-existance as a state as a matter of mere "argument over borders".
Why do you think I feel that way? Why do you not feel that way about the example I outlined? Is it because one topic (Trump's criminality) is controversial in the Western world, while the other one (Taiwan's independence) is not?