If the comment is off-topic/breaking the guidelines/rules, it should be removed, full stop.
The difference is that the bots comment should be removed regardless if the particular comment is breaking the rules or not, as HN specifically is a forum for humans. The humans comment, granted it doesn't break the rules, shouldn't, no matter how shitty their opinion/view is.
If posts make HN a less interesting place to converse I don't see why humans should get a pass & I don't see anything in the guidelines to support that view either.
The difference is that the bots comment should be removed regardless if the particular comment is breaking the rules or not, as HN specifically is a forum for humans. The humans comment, granted it doesn't break the rules, shouldn't, no matter how shitty their opinion/view is.