I'm sure you're not the only one who wants to do it that way. I'm sure you can find folks here on GAF doing things the way you feel they should be done. That said, don't tell people how to play, man. I think whatever you can use to get through single-player or coop content is OK.
It's like saying "Don't snipe that from so far, they can't shoot you until you're closer! This area was designed for you to be shot at, get closer", and I just don't see how it's an issue. Have people play how they wanna play. I think coming up with these strategies speaks volume about the community's dedication to figure out creative, intelligent strategies to enemy encounters. Call them cheese but they're usually the smartest paths to victory. I suppose you could say that it's only smart to
come up with a "cheese" strategy and not to merely follow Youtube instructions, but still. Live and let live
Vex Mythoclast on PvP, on the other hand: that just grinds my gears.