It's trivially true that being an expert and being successful are different things. Being successful generally means being a key part of a value chain that comes together at a certain time/place in society. Some experts do this. Some non-experts do this. Some non-experts become experts in the course of doing this. So what? A lot of people naturally put in 10,000+ hours doing the things they love the most anyway, and I'd bet they like being successful experts. This looks suspiciously like trying to console yourself, saying "there, there. you done alright in your own way". That's perfectly valid, but doesn't require rejecting other conceptions of what's desirable for personal growth. Certainly not publicly.