This is a really stupid comment that a lot of people seem to make.
We obviously don't play FFXIV for the grass, it's just one element, that would make the game look better.
Or we could say to everyone that likes fishing: omg go fish in real life instead, or play bla bla fish game. well OMG stop playing games, and become designer in real life if you enjoy crafting. Go play monster hunter instead, if you like killing bosses. Go play GW2 instead, if you like fate system! Go play Mario 64 if you like jumping, instead!
It's pathetic.
Well crafting and gathering isn't main focus of the game either, neither is fishing, or cooking, or riding chocobos, housing, Behests, Caravans; trees, rocks, rivers or anything else like that, still it's a part of the game. Every bit improves the game somehow.
Look at this MMO, and tell me XIV shouldn't improve, because it's passable already....
https://www.youtube.com/watch?v=SNFSw107MQs
No game would ever improve, if no one tried to make something better, because it's already passable.
FF shouldn't be just passable or good, it should be awesome.