I really don't think BLM, or any other class, is that difficult to play decently, even without a guide. I mean sure, if one only has average intelligence, maybe a guide is necessary to figure out the last third. But doing only 10% of the DPS one is supposed to is just laziness, not lack of guide.
Surely it can't be that difficult to figure out at least a basic Fire III -> Fire -> ... -> Blizzard III -> Blizzard -> Fire III rotation, with some Thunder III in between, and activating Enochian and pressing Xenoglossy when it lights up. Please tell me people aren't so stupid as to not figure that out. I can accept that the proper use of Fire IV, Blizzard IV and Despair may take some thinking, as well as how to use Ley Lines without getting hit by AoEs. Or the finer points of using Transpose and Umbral Soul during downtime. But I want to believe the basic rotation at least doesn't take some kind of genius to work out. And if I'm not entirely wrong about the potencies it should provide maybe more than half of the full potential