FFXI isn't a single player game, you don't have the right to access content 24/7 at a moments notice. The dungeons are on a server and access is shared among all the players.
It's funny how the more access they give the more demanding players are, people complain if they have to wait 5-10 minutes per entry. Flashback 5 years ago you could enter salvage/limbus/dynamis twice/thrice a week at best and there was a lot less complaining.
