Absolutely not. They regularly turn over IP logs to law enforcement for various reasons.
So it was 4chan before they made enough trouble to get law enforcement attention. In the beginning it was just a bunch of pissed off nerds posting anime that no one took seriously
The moderators' biases shape 4chan and which userbase it has, not the users' own subjective choices. Similar but not quite.
This is the sort of take you hear from a Reddit dopamine addict who's idea of 4chan comes from the losers on his favorite marketing platform.
Not even close. 4chan was vulnerable to censorship from day one, and succumbed to it completely over Gamergate, of all things.