Can you clarify what you mean here? (not trying to be cheeky, but I'm just not grasping) What is the difference between a difficult task and a task that sees high growth in accumulation of knowledge? In terms of the classical orchestral musician/swe analogy I don't see what you are driving at.
>In high growth areas its not easy to make it big without working insane hours.
In classical music (and jazz etc.), you can't succeed at even a prosaic task such as winning an orchestra audition without working life-destroying hours. From age 10(or earlier, really) to age 40+, most classical musicians who "succeed" practice alone at least 4hrs a day, and rehearse, perform (and teach, when they are older) another another 4-6 hrs per day. There really isn't room for anything but this in their lives. That is the info I can offer to help w understanding this half of what you are saying. I think I didn't realize that this was not widely known. Coming from this life, it is easy to lose perspective on what is generally understood.