Originally Posted by
Revi
You clearly haven't done much raiding. Sure, you can look up how to reforge and gem, but all that does is save you the hassle of using a calculator. Reading about your rotation also doesn't help you actually play your class. It tells you the basics, but it's still up to you to maximize dps while coping with various boss mechanics, proccs and CDs. Most players know their rotation, yet there's a HUGE difference in performance among raiders.
Now.. Don't need to think about how to beat a boss? Looking up tactics isn't even CLOSE to actually executing them and handling the boss mechanics correctly, if it was all guilds would clear 14/14 heroic the instant the top guilds released kill videos. Guilds are STILL progressing through SoO, so that's clearly not the case.
Blizzard designs boss encounters with addons like Deadly Boss Modes in mind, they've stated this repeatedly. That's what they're balanced for. Sure it's completely doable without, but most people don't want to cripple themselves and their raid just to avoid dumbing down boss fights.