It's also that a lot of management "decisions" happen in the moment. Is how they phrase something in a meeting or a one on one. It's how they respond or ignore questions. It's how strongly the push for someone to be promoted.

They're decisions, but often not something you can have sitting for review for days ahead, even if it's only seen by senior management. I've had plenty of times management announced something I agreed with, but the way they explained it was so rancid I came out of it upset.

At the end of the day, management, and in general all human interactions, are a glimpse into who you are. It can go amazingly well, or disastrously poorly. You can try to be very careful and say what's needed, but tone and timing and phrasing will almost always give things away.