Maybe that's true of major projects, especially when there are maybe unknown unknowns. (And maybe not.) But there are a ton of deliverables that should be fairl

Maybe that's true of major projects, especially when there are maybe unknown unknowns. (And maybe not.) But there are a ton of deliverables that should be fairly predictable that come with people who have downstream dependencies on them. (Promotion, launch plans, etc.) When something is late it can cause a lot of scrambling and wasted time/money. [And just to add, I'm mostly speaking to work I'm creating and delivering--for the most part individually. And to the degree that I'm depending on client reviews, etc. that's in the contract.]