See I was hoping you were going to come in with a demonstrably better strategy.
Your analogy is very bad. A more apt comparison would be the hard mode crota strategy where you deliberately leave the boomers alive to avoid spawning a witch. A strategy which is legitimate. And whose principle feature is dealing with adds by finding a way to avoid them.
The mechanics of the Oryx fight are that you have someone grab the relic and steal the aura, kill ogres to leave bombs which you detonate to deal damage, then hide in the aura to not die yourself.
The no knight strategy does not circumvent any of these.
The rest is just adds and the adds force a choice on you. Do you want to deal with ogres, or deal with the adds that spawn after you kill the ogres. Same idea as crota. Deal with the boomers, or kill them and deal with the witch.
And choice is a good thing. It's what keeps PvE from being a single script activity.
Another poster mentioned golgoroth. Same thing. You can trade the gaze back and forth, getting more damage in, but you'll have to really deal with the cursed thrall. Or you can do the one orb strategy, where you don't have to try to dps and kill adds at the same time.
Sorry but I just don't see how this is a cheese. You aren't taking advantage of an environmental glitch. You aren't abusing any code. You're killing the ogres at a different time and then dealing with them being alive.
And you know what? Some people prefer not to do that. Not because they consider the no knight strategy cheating but because they'd rather deal with the extra adds than the ogres.
You want to complain about the issues with the strategy, including the fact that a lot of people can't pull it off without getting lucky, then that's fine. Different people will disagree on which they find easier.
But declaring the strategy illegitimate is just silly.