It is a bit disappointing, but it doesn't mean there is "no point" to the feature. The feature is there for you to meet some new friends and maybe get involved in a clan. If the feature works how it should, it should connect you in with some people that you can go onto do Heroic difficulty raids (and Nightfall). Harder difficulties should require team work that only comes from playing with the team before. Where Guided Games doesn't allow for that.