I'm sorry that you just can't comprehend the extensive nature of my point. It's been widely debated, and besides the people who are used to WoW's ez-mode system, 10 mans lessens content and gameplay, and minimizes interaction between the community. I'm guessing you're a proponent of WoW's LFD tool as well, aren't you? If can't manage your time and put more effort into it, and socialize with more people, maybe an MMO is not for you.
-edit- Besides, there's still 10 man content which I'm fine with, what I'm not okay with is the same raid with a 10 man and a 20 man version.