I take part in conversations not for their benefit, necessarily, but observers’ benefit. And one of the most effective ways of fighting propaganda is to shine a light on it.
If you just delete every dissenting worldview without engaging, then it runs the risk of making the other positions more legitimate to others watching but not engaging, or gives fodder to the ideas that “we” in the more open parts of the world are just as bad as authoritarians at silencing dissent, which isn’t usually true.
I’d agree if the other poster was only spamming ad hom attacks all over, but there’s enough logic laced in there that I find it’s worth discussing and trying to understand, if only to better understand where Russian disinformation is.