IMHO... the LCC's have opened more jobs for the Pilots, Engineers, Aircraft Mechanics and such... not to mention the effect it had on your day to day consumer... LCC's have opened doors for him to travel and go to places he couldn't afford way back when all airlines were Legacy Carriers...
It's all about how the LCC's operate and make use of their airplanes and how they utilize them... LCC's have given the consumer options... options on how to travel.. if you're on a budget or if you're going over the top... so it all depends on the consumers...
just my two cents worth...