Along the lines you your question a similar one occurs to me. How many people would start a woodworking business now to support themselves using only hand tools?
For example, when I consider running a business to feed my family, I can't image how I would justify the time and effort to thickness stock with a hand plane. Even if my business model is authentic reproductions, I can make the final pass with hand tools and everything else with fast power tools.
It's a demanding way to make a living today even with the efficiency of power tools. Outside of some specific niche, I can't see how one would survive without power tools.
As a hobbyist, I'm under no pressure to be efficient or profitable, so I can choose to work how I want to. As woodworking professional, I would not have such freedom.
-- Dan Rode
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle