Incidentally, concert pianists are probably also not concert pianists, in the setting you want this comparison to apply. Yes, if you want to play with a major orchestra or win a classical grammy, you probably need to have been playing since you were 4 years old. But virtually no-one in our field operates at that level (despite a large cohort of developers who think they do); we are, almost all of us, constrained more by our environments than our potential. If the market for concert pianists was isomorphic for that of software engineering, a late-career switch to concert pianisting would also be reasonable to contemplate.
No we really wouldn’t. What I’d dearly love to be true is lots & lots of people to be given the opportunity to try the basics of writing software & the more complex stuff to be taught more plainly.
Even at the outer edges of the industry complexity spectrum we gatekeep way too much.