It's because of all the stuffy suits with top-secret clearances around here. Everyone is scared to smoke a little pot or drink a few beers to loosen up or go out for some harmless debauchery (like skinnydipping, urban exploring, and such, you know you did it back in the day as a teen!) or else risk their clearance/job. So everyone around here is scared to do anything to seem "different" or "not normal" and that creates the cookie-cutter boring stuffy people you see around you. No one wants to break out and be unique- and if you do try it around this area, people will shun you quickly because they don't want to (or have the balls to) associate with anyone even slighty different from them and their office job, minivan, 2.5 kids, and townhouse in the suburbs.
This GIF explains it all: