>>> Elite soloists, maybe — but that is actually a pretty expensive life to live. I would be surprised if many of them risked a life where they had no other job.
Yes, they really did. Getting to that level requires training at an intensity that closes off the option of training for an alternative career.
I think he's alluding to having family money.
So, even though you try hard to become a pianist, if you don't become famous, you're ok.
A friend of mine did this, he lives in a massive house and just enjoys his music, teaches occasionally.
I think often in families, if a generation is successful with money (for example as engineer or enterpreneur), then next generation often become artists or politicians etc.