You are missing out on the main thing to be gained from playing Dark Souls, which is to measure up to the challenges that are presented to you. Look, if you actually came up with the strategy on your own that's one thing, but if you are just copying a youtube video to get past a fight that can be annoying but has a bunch of legitimate ways to make it manageable that's entirely different.
You're missing my point entirely.
The only way the game cares about you "measuring up to the challenges" is that the boss is dead. If you summon someone to fight a boss for you, you haven't
really defeated them yourself, you haven't "measured up". But the game still allows you to continue
because the game doesn't care. And if the game doesn't care, why should we? There's plenty of challenges left to be presented to you, and since most people probably won't even encounter them all in a single playthrough unless they're going out of their way to, there's no harm in forcing your way around
one. Especially since a lot of those cheese methods are arguably even more effort than doing it 'properly', one way or another. You yourself said the firebomb throwing angle is 'extremely specific', and I know I probably wouldn't have the patience to get that right.
That was my original point, but since you brought up another one:
"Just copying a Youtube video" is a thing that a lot of players do to find items, places or strategies. Getting help from others has been a part of the series since Demon's Souls, and with how much information there is to learn in the games, trying to figure it all out by yourself isn't fun for most people or even necessarily efficient for the rest. Most people probably learned how to trick Dragonrider into falling from Youtube in the first place; does that make it illegitimate for them to cheese that fight that way instead of "measuring up to it", just because they had help to learn the cheese method? Why shouldn't 'jolly co-operation' include an anonymous stranger telling you how to get past Capra Demon without dealing with the dogs, as well as beating Malenia while you stand back and avoid her, or guiding you to a hidden bonfire?
And ultimately, it's up to the player as an individual to decide what they are or aren't willing to do. You don't want to cheese bosses from outside their arenas? Great. But you don't have any right to judge anyone who does. Saying 'you're not really playing Dark Souls if you blah blah blah' is the exact thing that turns people off playing the game at all. And given that the game is designed to make almost any build or playstyle viable, "really playing Dark Souls" is about finding what works for you, and artificially limiting yourself based on what other people said is as far from that as you can get.
(And given that what worked for Johnny was fighting Capra Demon head-on, the whole bit's turned out to be moot anyway, but you still missed my point entirely.)