Why can't we have jobs with this level of depth and customization in FFXIV?

[Felis]

Wasn't PUP (the job being compared to) released in Treasures of Aht Urhgan Expansion which was still lvl 75? It was released in 2006 btw, way before even FFXIV 1.0 was created so what are you talking about? Also... a game MADE BY SE, had a decade to be polished and seen what works and doesn't... and then most of the experience gathered from creating it is ignored when ARR was being made. It's not like XIV 1.0 and ARR was their first MMO.

Your argument would be ok if SE just copied XI instead to program another FF MMO with another mechanics and battle system. In a new MMO simple classes/jobs come first as a basic of the game. Complex classes/jobs come later. Like a strawberry cake. You bake thirst the bottom before you add the strawberries. Then the icing and the cream at least. You don't bake the bottom with the strawberries just because you did another strawberry cake before it already.