The number of bad players are rising!

[MrLeonheart]

Set Hardcore only if you're on a repeat run / speedrun for loot or tomes, and want to avoid noobs / delays.

Set Casual only if you're on the first run or still getting the hang of tactics. Or if you just prefer not to speedrun and love to help people.

Set Both if you're experienced enough that you can keep up with the best of them, but you're OK to slow down and help others out.

Ah yes, segregating the community is definitely the answer. After all, why should you, the Golden God-Kings of Eorzea be forced into contact with the disgusting unwashed casual masses? What benefit could possibly be derived from such a loathsome scenario?