...at some point, massive multi-national monopolies (or oligopolies) have a certain responsibility to societal ethics.
This isn't the local pub kicking out a loud-mouth racist.
The danger of these few massive corporation, which control 99.9% of all human communication, dictating what we can say will bite us in the ass.
It's important to remember that YouTube's policy isn't always correct. They defended the WHO - but the WHO hosted a video on Youtube from Feb-2020 to July-2020 telling people that they did not need masks unless they were directly caring for sick patients.
These massive corporations can no only get things wrong, they have an incentive to alter narratives to support their own agendas.
It is their ubiquity and size that necessitates they respect free speech of content creators, unlike a small business that we can easily avoid.
To give a more extreme example of the danger of allowing unfettered corporate censorship: Imagine if mobile phone companies started listening to the content of your calls, and banned your mobile phone from the network if you said something in a private conversation they objected to. Or Skype/Meet/Zoom did the same?
It's one thing to be kicked out of a bar for being an idiot. It's another thing to be kicked out of all bars all over the world, forever.