Well, if what you're saying is that a reader who is already biassed towards agreeing with the post will be motivated to upvote a post that complains about "cancel culture" because "culture wars," so use this one weird trick to get more upvotes even though it isn't going to persuade anyone who has yet to make uup their mind, you may be right.
(hard winkie, you definitely did not say anything about cancel culture or culture wars.)
But while you may be right about upvotes, I still feel correct about the fact that the tactic undermines the quality of the communication with respect to meaningful discussion amongst people seeking understanding. Furthermore, my fear is that such tactics increase polarization and knee-jerk reactions in comments, further devaluing good-faith debate.
If I'm roughly correct, the "disclaimer" feels like click-bait titles and other tactics that amount to "defecting" in game theory: They produce a very narrow advantage (worthless upvotes) for the poster, at the expense of the value of discussion to the forum overall.
The existence of tactics that undermine the quality of social discourse is a very hard problem, as we all know.