Yeah and so many things have no purpose. Like the AoE versions of single-target skills I mention before, now you might say "But hold on, plenty games have separate AoE skills equivalent to single skills, and they both serve a purpose", and yes, that's correct. But there's an important second part in that sentence, and they both serve a purpose. As FFXIV doesn't use mezzes as CC any more (or CC at all if we're being honest), single-target skills also automatically dealing some AoE damage and removing the separate AoE skill has no downside. It just frees up hotbar at 0 cost. Other games have mesmerize effects and hence the player has a need to have single target skills to not wake targets up even in AoE situations, sure.