When the Question isn't a Good Representation of Our Site
Speaking as a mod who has removed a few of these types of question:
There is a certain style of question that is likely to end up on the HNQ that shouldn't. These questions are usually group-dynamics, problem-gm, or problem-players questions that come off as more of a rant than an actual question.
These questions get a lot of interest with clickbaity titles and lots of drama. They also often drive lots of interaction through back-and-forth comments, votes, and answers, which increases the question's "Hotness" and gets it onto the HNQ. These questions also often touch on sensitive topics, further driving engagement, but not in a positive way.
Once on the HNQ, these questions tend to attract low-quality opinion-based answers from network users who just want to chime in on the drama rather than help refine the question or solve the querent's actual problem. These questions do not represent our site in a good light and are not the type of question we want drawing new users in.
Therefore, when questions like this hit the HNQ, it is better to pre-emptively remove them before the low-quality interactions roll in. It improves our ability to refine the question and help the OP, and also prevents unwanted noise.