Common Courtesy with End-game Raids/Dungeons

[Chippy2]

By your example, it's perfectly fine for a med student to perform heart surgery without any prior knowledge beforehand. When the student nicks a blood vessel he will go oh shit next time I'll avoid that! Too bad, parient is already dead.

I didn't say without any prior knowledge. I'm stating that just by watching a video don't make you a good open heart surgeon. Watching videos of Primal EX battles isn't going to make you a good video game player.