You are spot on about busywork and creating value.

I agree that founding teams should try to get complementary skill-sets in, but this can't be used as an excuse.

Or differently put… while I agree that everyone should do what they are best in, "focus" should come a bit later. Especially in the early phases founders are cross-disciplinary. I see a few people using the "focus on what you are best" as an excuse for just "doing what you like most" and ignore/hire/blame the rest.