In your essay, emphasize something unique and interesting both about you and about the profession. Anyone can say that they like pharmacy because "they want to help people" or "because of patient interaction," but few can elaborate on significance of these interactions. Helping people is great but emphasizing how pharmaceutical care and patient well being are interconnected is even more important. Keep this in mind as you are writing your essays. Try to distance yourself from other applicants by integrating yourself, research you may have done, and connecting that to the future of pharmacy. A life changing event defines character, which may lean you towards a particular profession. Things such as these show and emphasize your unique qualities, while maintaining in accordance of the essay question.
Don't mention economic benefits for the profession because they are external benefits, that is, they have little value to anyone but yourself. Mention things you can do to help others in pharmacy, as this will give internal reason to why you belong in this profession. Escape from the surface of the profession (i.e. money, careers, job shortages) and define pharmacy through a healthcare perspective. This is what will get you in, combined with an equally excellent interview.