Because all you need to know with the stuff that happens randomly is "when boss does this you do this". I don't even see how you can possibly argue that FFXI fights were hard to make a guide for when for the vast majority of FFXI endgame fights I entered blind and just got a brief explanation that was more than sufficient.

- If Kirin is casting an AoE run away from him.
- If we get claim on Faf/Nid tank party stands on right foot and DD parties on left foot. No DoTs so we can sleep him if necessary.
- Tank party stands here. Mages/ranged stand here. Melees rush in after the tanks position DL and Red Mages start chainstun. Burn him down as fast as you can and hopefully we'll kill him before he kills us.

You don't really need a detailed video for this kind of stuff.

As for skillchains and magicbursts. They were needed in FFXI because most jobs barely had anything to do during fights. FFXIV keeps me busy enough.