My general assessment of mentoring and micromanagement is that they originate from different objectives. The first is about developing the IC for their long-term effectiveness. The latter is about meeting deadlines and promises made by the manager, satisfying their manager/vp, and/or general insecurity because they don't fully understand the development process/cadence, technology, etc. A good manager can certainly also be a good mentor. One typically described as a micromanager, not so much.