As a BLM I find the reasoning SE's provided to be hilarious, raid utility? The only utility BLMs possessed was given to all casters in 4.0 and until SE decides to make more raids where AoE is a factor having the highest the highest AoE DPS is useless.

Let's be honest here, SE wants people to play the new classes, it is literally required in order to be considered a good return on the investment of creating these classes. If no one played the new classes because BLM and Monk/NIN did more dmg than this would mean that the investment in creating these new classes was useless.