This seems like a version of: https://www.paulgraham.com/makersschedule.html but taken to extreme dogmatic-ness.
I get it - I’ve fixed problems like this before and you’re so excited you found a hammer, now everything looks like a nail.
> a 10-minute call can cost me several hours of focus. And I might spend the entire day thinking about it.
As a manager, you should learn to change this about yourself rather than imposing your work style on your team.
> As a manager, you should learn to change this about yourself rather than imposing your work style on your team.
I think we need a different approach here. I shouldn't have to change anything about myself, because we're slaves to our habits. I shouldn't force this on people who don't want to work this way. I just need to work with teams that are willing to work this way. And so far, I've always managed to find such teams and such people.