I think you first need to be honest with yourself about a few things, at least these: A) What does being a master really means to me? Others respect? Peer reco

I think you first need to be honest with yourself about a few things, at least these: A) What does being a master really means to me? Others respect? Peer recognition? Work autonomy? B) Am I willing to change careers knowing I will never be a master in it? C) Does the trade-off of changing from a career that I master to a career that I will never master worth it? In your question there's already an implied NO, do not change, because being a master seems important to you. Regarding mastery, it's always difficult to achieve it, starting at 20 years old or starting at 50 years old. Most people don't achieve it, they just feel comfortable after a while.