You refer to a form of energy acting directly on matter to produce a gravity effect. Why don satellites or spacecraft rapidly slow down as they impact with this type of energy?
I don’t think the motional energy which causes gravity is travelling particularly fast. Matter decay is a very very slow process so the motional flow of energy would be more like a very gentle breeze. Significantly, in this case, the energy ‘breeze’ is accelerating. The reason that satellites and spacecraft don’t slow down is that there has to be relative acceleration between dark energy and matter for there to be any impact. No acceleration no force, f=ma. Don’t forget, if one is to attribute physicical properties to dark energy, top of the list would be that it would be inviscid, in other words frictionless and super fluid. Due to the fact that motional energy is accelerating in the vicinity of matter this relative acceleration which we experience, unless we are in free fall, has a mechanical effect on us and it is this that causes space curvature. Simply put, gravity is a mechanical effect and not just an inherent property of matter.
