the need for 3rd tank class

[Gamemako]

Why do people still think more tank classes = more tank players?

Because certain jobs attract certain players. There were people playing NIN tank in FF11 who would otherwise never have touched a tank job (funny because NIN wasn't intended to be a tank, but that's beside the point). Some players choose their class by role, but many (probably the majority) do not. They pick what looks cool and interesting to them, and whatever that job does, they'll play it. If Dragoon armor were simple grey armor with no spikes, I doubt we'd even have "loldrg" to joke about.