When you’re operating on the maker’s schedule, meetings are a disaster. A single meeting can blow a whole afternoon, by breaking it into two pieces each too small to do anything hard in. Plus you have to remember to go to the meeting. That’s no problem for someone on the manager’s schedule. There’s always something coming on the next hour; the only question is what. But when someone on the maker’s schedule has a meeting, they have to think about it.
The whole article is worth reading, but this paragraph above puts words to something I’ve been intuitively feeling but not fully understanding. An hour long meeting always costs me much more than an hour of productive work.