Very good point, and I would totally agree if the WoW addiction hooks weren't currently deeply implanted. It has become very apparent that Blizzard's model is to have the carrot always hanging in front of the horse. The thing that keeps me playing is the hope that I will be better. As soon as I realize that either everything is too easy or the original plan will not work, the hooks are removed and my subs are cancelled.

By Blizzard making PvP weapons difficult to get, they have essentially guaranteed my subscription for a month. If they gave me the weapons to start and it was either too easy or too hard to PvP then I would have already cancelled. Instead of making a balanced game (likely impossible given the number of variables they have) it is a better business plan for them to have perpetual change which results in perpetual hope.

By win trading and effectively feeding the carrot to the horse you remove the element of hope and replace it with "reality" of how good you/your team is. Perhaps that's why I'm not interested in win trading. Although the time will be decreased, I enjoy the theory crafting and hope that comes with not knowing if something is going to work. If it does work then I think the sense of accomplishment will hold my interest longer - that's opposed to getting it quickly and dominating, which to me wouldn't feel that fun because anyone could do it.