We have a friend who is an actual architect. Her children sleep on the second floor of a house she designed herself and built (with her husband). I wonder how many self-described software architects would have the confidence in their skills and the quality of their work product to put their money where their mouth is in the same way?

Team concepts which put one person in the center as the single source of all knowledge have a lot of advantages if that person is really good, but carry a lot of risk if they are not. There's a reason you train to an extremely high level before you become the chief surgeon in an actual surgical team.