A) The technology didn't exist back then to easily watch a video or read up on the mechanics of a fight. You had to buy/send off for a magazine/video for that kind of thing.
B) You aren't wasting 3/7/23 other peoples time by not knowing what to do in a single player game. By refusing to look up basic strategy and mechanics you are basically saying that your fun is more important than 3/7/23 other people's time, which is outright rude. If you want to figure it out yourself, then make a group dedicated to doing exactly that. Don't expect others who already have gone through that be willing to wipe because you don't understand something when you easily could.
Honestly this doesn't bother me much in 4mans, but in 8+ man content, you really should at least read about the mechanics so you know what to expect. Even doing that, you aren't likely to pull it off perfectly the first time, so you still get part of the fun of learning from mistakes.