Thoughtful people who want to get things done recognize that other people's time is a scarce resource that should be allocated deliberately, not routinely.
No, that's not it; you can both understand how scarce time is as a resource and still accurately believe spending it with others is more productive than spending it alone, depending on the work (and software engineering falls into the "time more productively spent together" set).
Periodicity is an arbitrary line upon which to draw acceptability, so when one draws it there's usually a reason other than, "I want to maximize effectiveness."
Periodicity is an arbitrary line upon which to draw acceptability, so when one draws it there's usually a reason other than, "I want to maximize effectiveness."