You really need to step back and look at it. Guided Games is designed to put Clans and solo players together for normal runs of Raids and the Nightfall. It gives people a chance to find a group of people they like to play with and potentially join them in a Clan, thereby also giving players a means to form a solid team so they can do Hard Mode together later on.
It is not lies and bullshit. It was a smart decision. You don't go into the harder activities with randoms.
Yes, and that is exactly the same as Hard Mode Raids. To play Heroic Nightfalls with randoms who might not know how they work will give you a bad time.