It's for your own good. :) This is what my own government say every time they want to control the population. Luckily freedom of speech stands very firm in my own country of Norway, but it does not prevent the state from using the phrase.
As for the validity, when policies are in the open, which they mostly are over here, and it is clear what it is based upon, then far more people willingly accept them, because they can look into the facts themselves. They can even discuss conspiracy theories if they wish, but no one buys them, because good information is readily available. So when Norway claims that something is "for your own good," it is actually mostly true, despite the negative connotation the phrase has in most other countries.
The opposite tends to happen when information is subdued and censored, which is regretfully the route YouTube is now on. They're taking a path which is more similar to a state bureau than a private company. You're left to only speculate as to why they would do something like that, but it's likely that it is a combination of social justice leadership and governmental cooperation. As such, their difference from a state bureau is starting to blur.
The strategy of top-down censorship is sadly a strategy most employed in purely Socialist and Communist countries. But then that shouldn't be very surprising when you also see the position YouTube is in, which is so much of a market leader that they border on a monopoly.
While I can't speak for YouTube directly, since most video services are indeed free, one of the main business practises to retain such a position, is to bleed money to keep most of their services priced so low as to destroy all competition. YouTube is in a bit of a different position, howeve, because their service, particularly their suggeston service, is far better than most if not all competitors. But every time they employ censorship in any form, they bleed customers to alternative platforms, and the effect of their censorship is diminished, if not outright reversed.