Ability and Efforts

Yesterday I went to a concert of Tatsuro Yamashita. He has a genius for music but he doesn’t like to sing in big concert halls.  He told he’d like to work with his expectations realistic. He is a first-class musician. I think he wastes his talent. But it is his belief.
I’d like to succeed as a pharmacist. But now I recognize it is impossible. I can’t even become a second-class one. I’m lacking in a capacity for communication, memory analysis and conclusion.

They say my efforts will be rewarded in the long run, is it right?
Should I content with a third-class one as little people?