Because the OP is another FFXI fan and just wants the game to be like FFXI 'old style'. As Alphoter5 said, the FATE system is a major part of ARR's gameplay, it can't just be 'scrapped' because the whole game would have to be modified accordingly.

The trouble with FATEs are is that they are endemic of FFXIV's overwhelming success - because there's just so many players, naturally there's more players actually participating in FATEs than what SE originally intended for, thus it's just a shortcoming in design. But there are plenty of FATEs which no one bothers with so really, you don't have to do the handful most players over-rely on - just go out and explore and you should find one or two that give decent rewards and are not over camped.