This is even worse IMO. The youtuber can have an active comment section but pause comments if discussion goes somewhere they don't like, such as criticizing their topic. They can then request certain comments to be removed or accounts blocked/banned.
This can guve the appearance of free speech while actually promoting censorship.
It is not only free speech but the fairness of a review of a product. Most people go to YouTube to see the review of a product and if comments can be manipulated that way many people will fall for a shitty product.