I've definitely seen this - managers reviewing or submitting code that was woefully unfinished. It forces the team to decide how much to push back against the person who decides if they get a raise in a way that's decidedly unfair. It also taints your perception among the team.

It's that old quote - better to keep silent and be thought possibly a fool than to speak and remove all doubt. If your job isn't primarily coding, and you parachute in to "help out" and end up making more work than you save, that burns a lot of goodwill that you can't really get back. You're not some junior dev that's going to get better with mentorship.