Unlike FFXIV which has no customization at all aside from Accuracy melded DPS/Healer Scholar or MND Melded DPS/Healer SMN for those times where you want to go one healer but still need extra heals but don't want to go two healers, so hybrid SCH or SMN can fill in those roles.
Now, some people may look at MMOs differently but FFXI is comparable to like Diablo series (for example). People like to play Diablo series to collect loot (And in Diablo II when Runewords came out, it was about making the greatest Runewords so you can use Barbarian's Whirlwind on an Assassin or teleport on everyone with Enigma). FFXI, it has a ton of stuff to collect. Plus, FFXI has a few builds too (trying to build a Great Sword Warrior or a Dual Axe Warrior for example), so there's some customization and variety.