So, Gravity could be caused by some kind of boson particle, or it could be caused by time/space dilation, or it could be caused by gravitrons. Yeah, it sounds like you have it all figured out.
Anyway, I am just saying that bendy light theory is still a young theory and we do not yet have all of the answers. That does not mean that it is wrong.
I never claimed it was all worked out. Gravitons and spacetime curvature aren't mutually exclusive theories necessarily. I don't know about boson - you mean the Higgs boson, responsible for mass? Looks like that's been more or less confirmed. There's still no quantum theory of gravity that ties quantum theory and relativity together, but so what? Relativity and Quantum Electrodynamics still work fine on their own. String theory and its progenitors seem to be making some headway into uniting them, but who knows.
My point is, there is no bendy light theory as such. It's an untested hypothesis, with one equation that I know of which didn't achieve much success at all. If anyone besides Parsifal is even pursuing it (if he even still is) I'm not aware of it.
Again, you have no reason to put Gravity in the same ballpark as Bendy Light, there's just no comparison. That there's a single force responsible for things falling and the motion of the planets, there's no doubt. The only question is what is the nature of that force and how does it actually work.