In the Air Force, at 29 years old, I'm considered as "peaked" as a pilot. Not because I can't get better from here. But because I will never be in a position from here on out to focus solely on my craft. I am a supervisor now, mid-level management, an as long as I stay in, I'll progress in rank and experience to where merely flying jets will be less and less my primary duty.
Is being a modern golf architect much the same? The more experience you gain and the more courses you build you become more of a leader of a team with the same set of values rather than the tactical force behind the course?