It's not true. Put aside the fact that "skill" is more linked to the player for the major of the time, I play MCH, BRD, SAM, MNK and DRG, I don't find melee more difficult or anything else than other. I would even say the hardest dps I've played is MCH, which the Rota is very punishing for any mistake, and any death too hard to recover.

Btw, Only the MCH is better than some melee, and it's not all, and the MCH needs to be very very good. And it's not the... What? 2%? Of the players that plays MCH whom will out the melee from the meta...

No, for me, the only problem is that some jobs are too powerfull together, like the combo DRG-BRD-MCH. It's waaaaaay too powerful. They are buffing each other with a perfect synergy, and beside, you have the RDM, BLM and SMN, three casters, that barely interract between them.