http://www.vg247.com/2014/08/22/destinys-raids-arent-for-everyone-theyre-for-me/
This link is in that article so maybe you read it already, but Bungie did raids this way on purpose, knowing that not everyone will be able to do it. The game is designed to have something for everyone: casual players can just do the story, people who only want to play multiplayer can do that, and the super hard core can do raids. You know when people say how Cod needs to be changed up because some players can max prestige in a month? This is Bungie's solution. Max prestiging isn't something everyone can or wants to do, and neither are raids.