True Left

"back then it was a viable path for some musicians to be literal recording artists who concentrated primarily on recording:"

Could the same be said for performers to concentrate on performing?

"Some people like to try over and over until they get exactly the effect they want."

What about those who are required to get the effect by a due date? Because that was the point I was trying to make. Rather than practicing over and over until they get their effect by their own pace, some artists are challenged to get their effect by a certain deadline. If I am wrong, explain.