Goodhart's law. You award dopamine for closing questions, so they will be closed.

Even though you didn't get a reputation score for that specific action as I remember, it still gave you the little "I'm helping" feeling.

The honeypots in the review queue trained you to err on the side of closing questions - you were punished for not closing a honeypot when other people had closed it, regardless of whether it actually deserved to be closed. Complaints about incorrect honeypots were frequent and the system was not improved.