Its a balance.
You can have too little ACC and also too much ACC (As in, points are not in other stats instead)
They don't expect you to get a full set of one type of item (weathered...crafted..ect), but mix and match (Ever notice that best in slot complete set was NEVER all Myth or all Allagan pre patch?)
There is a mixture of both for best in slot, which in the end will make your acc where you need it to be.