because you are not spending time licking envelopes and entering expenses;
because you don’t have to be the bookkeeper, HR coordinator, travel agent, receptionist, schedule manager, document drafter;
because ethics and professionalism are culturally valued and “givens,” not scorned as an obstacles to growth;
because the work product you produce to your clients is as excellent as you want it to be, rather than having to make stylistic sacrifices along the way in order to meet deadlines or budgets.