Except that people who can recognize when something is indeed "good enough" and then move on to the next most important thing are ultimately the only people who get things done and accomplish goals.

That's a false dichotomy: the difference between good work and shoddy work is much different than the difference between perfect work and shoddy work.

Paul, I think our work is good. We thought about our approach very carefully.. And we have built systems like this before. The main difficulty is to combine moving fast with limited resources, with delivering something supportable and improvable, without creating technical debt.