no, your logic is flawed there punky.
Bill Gates poor physical condition is not due to the amount of money he had as a teenager. Bill Gates isn't an athlete because he spends all of his time using his vast computer intelligence in order to do the same day to day things Bruce does....only Bruce somehow manages to fight crime and work out extensively in the exact same day.
still....a lot of what he does is from home. If not home...Wayne Enterprises (or whatever)
But unlike Bill Gates...you don't hear about Bruce traveling the country much on business.