I'm talking about my motivation, and that of other 550s. I don't doubt that the 535-549 guys enjoy the conquest points from rbg wins.
Honestly, the rbgs aren't my favorite thing, and I wouldn't shed any tears if we stopped doing them. I personally think that the rbgs provide a talking point against the guild that outweighs their benefit. But that's not my call to make, the officers decide that kind of thing.
If Warmane wants to adopt a policy against guild members playing each other in rbgs, then I'm sure Devastation will comply. But right now there is no such policy, and the rbgs are kind of a guild tradition. For me, it's kind of like a raid on Stormwind- kinda boring, tbh, but it's a guild activity and I try to be a good member of the guild and participate.
My only issue is with those who talk about "wintrading" or us farming "lowbies" in the guild, when that is 100% false. I can promise you that every Devastation rbg involves geared members of the guild trying 100% to win.