I'm a new player, but I also played FFXI for so many years I've abandoned this mentality. Back when your Sky NMs despawned if you wiped and took too long to recover, or making your party wipe enough times from not knowing your role cost them more than item durability, some of them lost the level they needed to equip the gear they had to have to even do the fight.

When it comes to working with a group of random people this method can't hold up. You'll find yourself kicked out of parties. I can also think of parts of this game that simply don't explain why you died. Like Mortal Ray in The Sunken Temple of Qarn. If no one told you to stand on the glowing tile to clear doom how many times is your SCH or WHM going to have to pick you up off the floor before you do? Or knowing where to hide from Garuda's shriek. There are too many things in this game that can kill your whole party if you don't know what you're doing ahead of time.