See, this argument I can understand (though calling the OP 'whining' is off the mark and insulting). And in a F2P game, sure, it doesn't matter if people aren't actively logging in as long as they buy their tat from the cash shop, make the investors back their money and the game can limp on with minimal updates of significance (hey! more shiny stuff on the cash shop!) until the crowd wanders on.
Subbed MMOs need people to be actively engaged with the game to justify maintaining their subs. OP's point is that the game is missing out on a compelling feature by being restricted to a case of log in, select dungeon, wait, raid, repeat, log out which is ultimately not very engaging.
Whether you feel he is accurate in his assessment or not is something valid to argue. "Hurr, this isn't XI-2 you guys don't matter' is just derp.