I'm not so ready to call Vegas a 'cesspool' .... I mean unless you're just a boring person who never parties, does not like to drink, and is afraid to talk to women.... js - Vegas is a party town; it's the place to be, 'for a good time' - and I think it does a great job of serving that purpose.
Do they allow some things in that city that other cities do not allow? Yep, they sure do - but does that automatically make the city bad??? Plus, there are all sorts of economic motivations to 'centralizing' most of what they allow in Vegas; there are people who run that 'Game' and don't really 'allow' it in other places; The Indian Reserve Casinos are new; and seem to be an exception; but even they have to follow 'rules' made by others....
Otherwise, just about every town in America would look more like Vegas does.