Square favors simplifying duties for the sake of the Duty Finder. As in, any random Joe's within the item-level requirements can complete it when paired with variables in the same boat -- and nothing facilitates this better than having as little confusion as possible along a straighter path, leaving exploration up to the individuals in their own time rather than having people get lost or wander off when others just want to complete-and-yeet.

Take the Nier Raids as an example. There's not nearly as much trash or exploration compared to, say, the old Ivalice / Mach / Ark areas -- they saved the exploration side of it as part of the story-quests and/or the added kinda-not-really mini-game of finding information inside a trash-less instance so you can absorb the scenery at your leisure -- but as far as the actual raid itself, they opted instead for mini-bosses or funky transitions like that laser-tunnel in Puppet's Bunker (give or take a few trash pulls that are like scripted encounters rather than mechanicless trash). I'm sure that's a more interesting stop-gap (for some) compared to clearing variable packs of trash in between one boss room and another, a lot of which don't even have mechanics, never mind loot. And no, slapping a few mechanics on trash mobs doth not make the process all that more interesting for most people. It's basically the easiest way to make people work towards the next loot piniata.

The old ARR MSQ (Prae/Cast) was pretty expansive and had people doing mini-tasks inbetween packs of trash, yet not a lot of people who've done it before will want to do it again outside of a Roulette, and even then it'll cause groans. Most first timers will spend their time not knowing what the hell is going on while 80% of the raid are trying to get it over with as quickly as possible.

It's all fun and games initially, but as time goes on -- especially when content becomes outdated -- you're either there solely for the loot (such as Nier tokens for Cryptlurker, maybe even transmogs, possibly achievements, or first-time / one-time quest clears, etc), or you're doing old content at min-itemlevel to relive the good old days. Yes, the exploration, scope, and trash struggles have their charm and appeal, but those don't last long.