High raid teams are not highly focused on DPS only, it's an additional requirement using the jobs tools, and the communication.
Tanks: DPS, Mitis, Reprisal, raid group mitis, communicating with your Tank mate, and responding to raid buffs.
DPS: DPS, Addles, Feints, positioning, self heal, responding to raid buffs and timing of raid buffs.
Healers: DPS, healing efficiently, avoiding over healing, timing of raid buffs, communicating with Healer Mate, proper use of O-GCDs.
Healers for example may achieve a good parse, but they're not up to scratch if they're lacking solid healing department.
DPS maybe a strong point of getting raid groups, however like I said, you need to perform the job well of what it can do, not just high level of DPS.