The most ridiculous part of your arguments is that they’re all based on the premise that it’s intended usage by design, just because it’s possible.
That the arbitrary limitation to disable queuing as a group/raid is not intended by design to prevent queuing as a group/raid.
That it’s an intentional benefit to the smaller matchmaking pools (since it can’t be done in gigantic pools due to the amount of new BG instances per second which rapidly speeds up the random assortment of players, or in the case of Horde in the merged EU matchmaking pool where they do split them up if they queue at the same time as only a few people, although it would however increase the rate of success as a full 40-man timing the queue).
That the lack of punishing people for it should mean that it’s not something they recognize to be a violation of the rules even though it falls under the technical definition of game exploitation in their rules.
That they passively permit it when they haven’t even officially recognized it to be a thing in the first place.
That’s what you’re claiming with your arguments.
Nice one.