Can we stop acting like Destiny is some hard to figure out game? Nothing in the game is super complex and is overall very easy to figure out and perform, that includes raids. People aren't going into missions to not beat them, you can get a random group of people and they will generally work together to accomplish a goal.
Can I ask how many raids you've done and how many LFG groups you've run with? You may just be very good and not realise how hard they are for other people.
I've done all of the Destiny ones, including all hard modes and challenge modes in D1, plus the D2 raid on normal... I STILL find them hard to execute. And I'd say about half the people I came across in LFG also struggle to execute. (that's out of about 20 to 30 grouos with 5 other people in each group)
And that's out of a much smaller set of players than you'd get with simple Mm.