The underyling issue is actually pretty simple.

1. No MMORPG exhibits the same kind of negative impact due to lag as FF14.
2. FF14 exhibits no positive benefit compared to other MMORPG as a result of its netcode.

Therefore the only conclusion is that FF14 is wrong. There's no justification for it beyond whoever picked this method is dumb. It'd be like you trying to build a car out of square wheels and trying to tell people how it's really hard to get a car working with square wheels. No one cares because it's your own stupidity to use square wheels over round ones.