I'm more in project management these days. It makes me laugh when an engineer says "I didn't get any work done today, as it was all meetings" - means I don't work for 20-30 hours/week.

The trick is balance for the role. For engineers it should be a lot more focus time, for PMs and managers it should be a lot more managers, but you should still be able to block out calendars for focus time if you need to - just not all day, every day, forever.