Botting I would think is more from normal players than RMT, RMT have very little reason to exist in FFXIV. They would of stockpiled enough gil by now "just incase" but thats about it.
FFXIV in it's current state is very difficult to play and certainly not pleasurable, as such botting lets people level without having to force themselves to put up with the game. There are also quite a lot of ex XI players that really don't care for the grind and just want to get to the finishline, as such they will bot making money, farming and leveling as much as possible.
Complaining about botting is kinda silly, the devs have so many things to worry about right now as to if the game will ever ever be able to turn itself around.. let alone worrying about people using aps. Honestly that is the last thing on their minds right now, if they do turn it around it will bite them on the ass but the chances of that scenario are far from great. It's like worrying about how you're gonna pay your credit card bill as your hanging off a cliff with one arm.