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

[Risvertasashi]

Recently I reactivated on That Game, and I was checking out some of the new jobs added since I last quit.

And I came across this page.

Holy sheet. Not even just spells and abilities and MP/TP management... You can even customize the AI??

Why can't we have jobs that have this kind of customization and depth in FFXIV? My FC doesn't understand why I refuse to play DPS in XIV, but... if there was something like this... I wouldn't even care if it was shunned in endgame, I'd be all over it anyway.

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Edited to add: (To help keep this thread on topic)

This thread is not a request to bring in puppetmaster.
This thread is not a request to copy FFXI mechanics or endgame, etc.

What is it? A request for more complex, thought out, deep jobs. Comparable to some jobs/classes seen in other MMOs. I used a specific example of a job from XI I came across while surfing, but it's not the only example out there.

I'm not saying the more straightforward jobs should go away. I would just like to see some options at the other end of the spectrum.