I think Tom Doak, hit the nail on the head
Everyone in the world wants to be an architect or to be paid to have an impact on these top level courses or new builds.
Until it's your job, and paying your bills depend on it. As it's fractions of an inch sometimes, other times its the whims of a fickle client or sometimes it's just nature. That makes you lose month or thousands of dollars of work.
That's true smoke a pack of cigarettes and still be jumpy stuff. If you're not built the right way for it or if you don't have FU money already in the bank.
As one bad call or bad day and your gone. One truely bad call or bad day, you never work again in the field.
That's the level that some shapers and architects rise to/thrive in. For others it makes them run and start working for a planning commission or off to the mine to load haul trucks to pay their bills a little more safely.