And that's why micro-management is a problem. If it was dead-simple easy to differentiate from everything else, people would know when they're doing it. As with so many undesirable behaviours, though, it's those blasted fuzzy boundaries. People think they're doing one thing but are actually doing another...and generally wondering why it isn't working out as well as they thought it would.
One of the many reasons why self-awareness is an extremely useful competency for a manager to have.