Pressure on famous artists

I m responding to chelsea's post question. Her question is :Do you think famous artists produce better or worse work because of the pressures on them to keep being great?
I think that all depends on the person producing the art. Some people buckle under pressure and cannot achieve what is expected of them. Where others would over-achieve and excel under pressure. I believe that some of the greatest works of art are created because artists are expressing themselves whether people will like it or not and it has meaning. When artists become famous, they can still express themselves through the art, but they have more motivation to give people what they want, instead of creating something that came from their soul. On the other hand, I think that famous artists are motivated to try harder to produce good work. my point was when artists have this pressure pushed on them, they will not always be able to create good works of art, even if they do try harder. Like when some people take tests and they forget all the answers even though they studied for hours because there is so much pressure to do well.
Question: do you agree that artists create better work a majority of the time, when they are just expressing themselves, instead of trying to make money?