This may not be WoW, and it may not be PvE, but getting 8 people of specific class/spec online at the same time for rateds is exponentially easier than getting 40 people online at the same time for a WoW raid. I understand that the population on PoT5 increments this challenge, but guilds like mine (HSP), Casual, Ubique, Brutalize, and Hostile Takeover didn't just spring up overnight. It takes time to meet good players in pugs and convince them to form a group together in order to progress to the next level of PvP in this game. Concurrently, It takes time to build synergy between those people and gain ability as a team.
totally agree, working on getting there, one day