No. Doing well in school is just one part of the "recipe for success".
It is important to be skilled diplomatically and to be perceptive of unspoken communication.
It is critical that one be well-mannered, organized, energetic, motivated, networked and most of all in a good mood (optimistic).
It helps to be morally grounded and not involved with substance abuse or alcoholism.
Last but not least, one should be migratory, moving to areas experiencing job growth.