First of all, this is about “YouTube banning 'medically unsubstantiated' content.” as well as content that “would go against World Health Organization recommendations,” which (if those guidelines are followed) doesn’t mean banning of people or discourse, but rather disinformation. Secondly, the WHO tweeted that, but had actually already acknowledged human-to-human transmission multiple times[1][2] in the days before the tweet, so no, I wouldn’t support banning discussion around a tweet.
I agree. That being said, I think getting more definition and transparency around all this on YouTube/Google's part is going to be really important, though I don't expect it, sadly. There's a fair amount of flimflam being pushed on YouTube right now--everything from literally ingesting chlorine dioxide, to other "holistic" cures that _appear_ to be benign.
1. https://www.who.int/csr/don/05-january-2020-pneumonia-of-unk...
2. https://www.who.int/china/news/detail/09-01-2020-who-stateme...