I think a lot of people pick up this game because it is a final fantasy game more than an mmo, at least I was one of those person. When I started this game I had absolutely no idea that there were roles, what a tank or aggro meant and was even a thing.
'Luckily' the sword and axe play weren't my thing so I started the game by being a pugilist, which mean less responsibilities... but oh boy I was that awful DPS everyone hate in their party that does every stupid thing possible. I remember someone trying to explain to me that we had to all focus the mobs in an order given, but I wouldn't understand because I knew I could take up group of mobs by myself... outside of instances (at least now I'm a bit more patient with new players...)

This game is supposed to be pretty noob friendly (?) but just a small tutorial asking if we are new to mmo and giving us a quick description about what role are should be a thing.