I would generally agree, but in many cases 1) people don't read the comments/replies, 2) interesting responses get drowned out by low-quality responses, 3) the criteria by which useful responses get highlighted can be skewed by a variety of factors, including vote brigading and algorithmic bias or sometimes just a bias towards the earliest comments (which get upvotes, which then get more views, which get more upvotes).

The flipslide is trolls will spew out the lies faster than you can rebut them. Much faster. Orders of magnitude faster. The lie is short, pithy, and requires little thought. The truth require context and effort. After a lie has been rebutted several times there is little value in allowing it to be repeated constantly. Eventually the truth tellers get worn down and the lie is allowed to live on in perpetuity, allowing more and more people to believe it over time.

I agree that the government should not censor statements that don't violated specific laws.

I am strongly convinced that any person or organization has the right to moderate content flowing through the systems they host. If you want to say "I don't believe the Holocaust happened", that should be your legal right. It should be my legal right to tell you, "go get your own soapbox to spout that nonsense. You're not doing it on my dime."