The Lightforged Draenei who are warlocks are very small in number, the only one I am aware of who is named lost his faith in the Light as it routinely failed to save his people, only sustaining just enough for them to continue to fight. He went through the rites and was infused with the Light, which is possibly permanent as we’ve never seen it fade, before his ideologies drifted away from that of the Army of Light. It’s certainly not common, however, nothing precludes anyone from learning the magics warlocks wield other than it being generally a taboo in most, if not all, cultures from members of the Alliance and Horde. It’s still learned magics.
I’m on my Draenei shaman, To prove I like diea to lest think i can Role Play shaman that have understnad not of elements but can think Fel can be elements as well not to use for evil but to help fight for good fight
Power only matter how you use.