Again, this isn't three years ago. Content has been repeatedly nerfed over and over and over again. If you are unable to clear at least 7-8 HCs every week, you're a braindead player. The game should not be designed/balanced/catered around these people, especially "end-game" stuff. When the most recent BQL, Professor, and Sindra nerfs went into effect, a ton of guilds who were 'struggling' beforehand suddenly secured their kills that week. This gives you access to most HC off-pieces as a 'casual' raider. If you're not able to get PvE gear at this point in the server, leave and play a more recent WoW expansion where gear doesn't factor into PvP, get better, or find a better guild.
If it's genuinely 90%, then it demonstrates that you don't need excellent gear or 400 IQ to play sufficiently well to have an impact in BGs. Your definition of casual is changing pretty drastically here, from 'incapable of clearing nerfed content on Lordareon' to '90% of the WotLK PvE realm server population'. I'm glad you're willing to trade 10 minute queues on EU peak hours so you can gearbash people all day; I would like to retain my 20 second EU queue and 5 minute NA queue times so I can actually play the game on my evening hours.
At the end of the day, what it seems like people like yourself want to do is to be able to play exclusively verse Lordareon players so you can gearbash them repeatedly until they stop queueing. Whenever you're forced to play against people who have similar or slightly better gear, it's all crying. I'm a virtually BIS PvE Hunter with most Wrathful and all of the PvE off-pieces I could ever want, and yet at the end of the day I can't get above 1.9k in soloq/2s/3s not because of gear and how "unfair" it is that Icecrown and Blackrock have easier access to the same gear, but because I am a bad player in PvP. And in the situation you want, I would have no incentive or need to become better because there would only be 5 teams max in 2s who are comparatively geared and 20+ undergeared (3s wouldn't even be able to be queued for) that would be farming each other until one decides to stop queuing. Stop blaming your inability to improve and get better on other peoples' ability to accumulate gear faster/easier (alternatively you could go join them).
MORE IMPORTANTLY, when it comes to BGs, still nobody in this thread beside myself seems have noticed/mentioned that the ilvl brackets have been broken recently, which I bet is what the majority of players are actually complaining about, which is completely valid because fresh level 80s with leveling blues/greens should not be queuing into 6.3 PvP players. This is the #1 priority that needs to be fixed right now because it's actually ruining BGs.