To be fair, how discussion in academia works is quite laissez faire, it just is predicated on that you know what you're talking about and have evidence...Usually.
Granted there are biases in certain fields and academia is prone to its own issues in certain regards. (There are fields that are definitely prone to echochambers, usually in specific niches.) There's also issues in regards to big businesses or lobbying groups funding research in the hopes that it confirms their pre-conceived notions or potentially off-color findings being censored. These are major issues, though they don't discredit academia as a whole.
Really, censorship usually isn't so much of an issue as it is a burden of proof and what's going on isn't quite moderation as we understand it, but more or less verification and a continued process of evaluation, reevaluation, peer-review, and continual back-and-forth. As a Popperian, pretty much agree with it