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

[Felis]

Monsters with strengths and weaknesses would also add flavour to the combat instead of having everyone mash the same button combos on every single enemy regardless of type.

Is it so bad that we don't have the "juhu, I do 100 dmg more with this element skill" moment anymore?
Even in 1.0 and 1.23 the difference between right element skill and wrong element skill was not very big.

And BLM played during 1.23 this way:
single enemy = lightning spells
group of enemies = fire spells
reducing enmity = freeze
managing your mp = good luck