Earlier quoted context omitted.
So your point is that a federal agency got more data and updated its guidance inline with that data? That's what they're meant to do...
Their point is that the official stance can easily be wrong, which calls into question whether it's a good idea to silence people who are questioning it, which is what many were doing on social media in early 2020 when the official stance was that masks don't work.
as per the article, youtube's policy is: "and we make exceptions for videos that have additional context such as countervailing views from local health authorities". So presumably if your contradicting opinion is actually substantiated you're not getting the banhammer, which seems fair to me.
But letting people rant against public health guidelines which exist to prevent harm (even if to some degree uncertain) without actually justifying their case is irresponsible.