This standard they are setting up, already started with warnings and bans for in any way contradicting the WHO, is impossible to maintain in a consistent fashion.
I can still find thousands of videos on homeopathy, ranging from debunkings to lecture-style videos. There are people who would advocate using this rather than modern health services.
In fact, there are people who would advocate the use of witchcraft to treat cancer.
Will YouTube ban them all? Or will they just ban certain topics based on a whim?