Isn't that the point of MMOs? for you to find friends to play with (or join the MMO with friends) and raid with em. You get a chance to find a static group every week. The reason there is no outcry is simply because players prefer this method. WoW has an LFR raid system where you DO NOT need static groups, people hate it.

We are not being forced into static group, this is a design that people prefer.