While I did agree with some of that, I do want to put out that "achievements and stuff" last forever. Gear all becomes GC trash and turned into random minion coffers in the end. While there are titles for clearing savage and a mount or minion - these all become easily obtainable (maybe a few hours of just doing Turn 4/8/12) in the future. Whereas other achievements that have nothing to do with raiding can remain difficult/rare for years.
But that's the beauty of FFXIV - its got something for everyone. I used to just stop playing after I got my raid gear. And then I almost found it a chore to come back when there was a new major release since it was time to get new gear again. That no longer drives me. However, I'm glad it drives other players. But if all these players are going to do is grind gear and then leave, I wouldn't expect them to wrap up that "chore" in a few weeks either.
