anti cheat software are often inadequate in doing anything. Those software often break the games they're supposed to protect. They mostly only affect legitimate users.

Anti cheat program would also have the side effect of probably preventing people who use Linux from playing FF14.
While Linux is an unsupported platform it is possible to play the game on it right now. (And pretty well at that)
It would be sad for those people to lose the ability to play the game they pay for in exchange for a program that doesn't really work.

Just my opinion ^^