Jessica,
It is certainly unrealistic to think that anyone can do something simply because they WANT to (that is, so long as they have the motivation, they can succeed). There are limits (both functional limitations and just the limitations presented by limited talent or ability in a given area) that will make it impossible for some to succeed, no matter how good their intentions. The hard part here is often to recognize that the information and skills that were necessary in a given field yesterday, and are still necessary today, may be applied differently tomorrow due to changing societal needs,… >>>