Compact skills similar to PvP

[Jovakim]

snip

I admit that my wording about "completely remove all chance for error" might have sounded like "remove any chance of human error", but I was actually referring to the impossibility of breaking a combo when executing said combo.

A Dragoon repeatedly using the Full Thrust (raw damage) version of their combo is still much more effective than another Dragoon who consistently misses the third or fourth step of their combo. Both approaches are suboptimal, but the player using unconsolidated combos is at a disadvantage.

If we choose one of the other jobs' filler combos that don't branch (MCH, RPR, PLD, GNB, and DRK), you'll only break consolidated combos if you use AoE skills.
Meanwhile, someone with unconsolidated combos (who can still mistakenly press an AoE button) will have the added disadvantage of being able to break the combo itself at any point.

I haven't even mentioned how hitting different buttons in a specific order can still require a small mental load, even for those who have it down to muscle memory.

No matter how you slice it, they're not equally taxing or have the same chance of error.
That's likely why the devs didn't include it in the expansion where they are adding some follow-up skills on one button.