I understand where you're coming from, but as a raid leader you get REALLY tired of having to teach the fight over and over. Expecting people to know the fights before they show up to raids is reasonable, and achievements are the only way someone can prove to a raid leader that they've at least seen the fight before.

It's your responsibility to learn to play your class. It is not your server's, or your raid leader's, or your guild leader's. If no one will teach you, go learn for yourself.

It *is* super frustrating when you know the fights but won't get invited because you don't have the achievement. It's also frustrating when you can meet the DPS benchmarks but don't get invited because the raid leader doesn't think you can do it in the gear you have. Unfortunately the only way for raid leaders to know what they're getting in a PUGger is to do achievement and gear checks. If it bothers you, try leading your own raids for a few months and see how much MORE annoying it is to deal with people who come to raids without even reading strats, or without meeting the minimum stat requirements.