how can a game that came out in 2004 have instanced housing but this game cannot?

[Edax]

so again i restate my question why can a game made in 2004 do that but this game cannot?

Because Square Enix Holdings Co., Ltd. controls the intellectual property and chose not to implement your preferred housing system. It's the same reason you can't fly around space in Battleships like Eve Online despite Eve Online being a game from 2003. Square Enix choose not to implement it for FFXIV.