Why would a deploy need to be a feature or something that PMs identify? On a high-functioning team, you should have enough logging and monitoring that develope

Why would a deploy need to be a feature or something that PMs identify? On a high-functioning team, you should have enough logging and monitoring that developers can identify many useful changes without PM involvement. A deploy could be something as minor as "I noticed an error getting logged in production, here's a one-line change to fix it" or "This operation is running slowly, here's a tweak to the query so that it hits an index".