Taking someone’s time should be a pain in the ass. Taking many people’s time should be so cumbersome that most people won’t even bother to try it unless it’s REALLY IMPORTANT! Meetings should be a last resort, especially big ones.
When someone takes your time, it doesn’t cost them anything, but it costs you everything. You can only do great work if you have adequate quality time to do it. So when someone takes that from you, they crush your feeling of accomplishment from a good day’s work. The deep satisfaction you’d experience from actually making progress, not just talking about it, is eliminated.
If you don’t own the vast majority of your own time, it’s impossible to be calm. You’ll always be stressed out, feeling robbed of the ability to actually do your job.