Well, if we're only talking "need" in terms of survival, I can't think of very many professions one might "need."
Doctor, dentist, EMT, firefighter, search-and-rescue worker, police officer maybe. There aren't that many people who work at the bleeding edge between life and death.
Of course, if we count all the people who make it possible for the above people to do their jobs--people making surgical instruments and drugs, people training dentists and EMTs, people fueling firetrucks and helicopters, people growing and preparing food for search and rescue operations... hmm. Pretty soon we're back to needing most people. Including fiction writers, who, IMO give everyone concerned a well-earned sanity break.
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Doctor, dentist, EMT, firefighter, search-and-rescue worker, police officer maybe. There aren't that many people who work at the bleeding edge between life and death.
Of course, if we count all the people who make it possible for the above people to do their jobs--people making surgical instruments and drugs, people training dentists and EMTs, people fueling firetrucks and helicopters, people growing and preparing food for search and rescue operations... hmm. Pretty soon we're back to needing most people. Including fiction writers, who, IMO give everyone concerned a well-earned sanity break.