Some things are a matter of opinion. Even worse, some things seem objectively clear yet are censored by YouTube for wrong think.
I suppose my point was that you've picked some very low-hanging fruit there (and even then I think the vaccines one is far more nuanced and complex than that, and the flat Earthers are ultimately harmless).
Do racial diversity. Who is right and who is wrong? Why should those preaching the virtues of third-world immigration to the West be promoted on YouTube while those preaching the virtues of nationalism in the West are censored, demonetised, or banned?