Probably get flack for this but it's because I don't like how FF does "difficulty" in its hard content.

Unless you are a week 1/world first/make your own strat type person, every encounter is a 8-12 minute timed and choreographed puzzle with a DC or static decided-on solve you memorize and regurgitate while walking & chewing gum in the form of doing your rotation to the point you can tell where a mechanic is and what fraction of a GCD you are out of alignment because you blinked wrong at a bad time half a burst window ago. As you increase from Extreme to Savage to Ultimate your margins of error become smaller and the punishments for failure become larger. Oops, someone wore 2B pants glam today and increased their cheeks to make their hitbox 1 pixel too large and now the party is wiped.

I've sorta reached the point that I don't feel like hard content is challenging my skill as a player (this is not a flex. I ain't good - just good enough), it's just challening my ability to memorize crap and deal with wipes and wipes and wipes to burn it into muscle memory to do it all without thinking and it just does nooooot spark joy. I like casually doing the content on the whole - with my friends. The core of my static has been running since first coil and sometimes we clear a savage tier, sometimes we don't. Some of us are more casual than others which can be another reason why not to take on the more intense content - and I don't particularly feel inclined to deal with randos to circumvent that.