It depends which metaphysic (metaphysical theory). In his theory, gravitation is an abduction of the God concept. Partially of course, but nonetheless in a real way it offends his concept of God, he is righteously indignant at the sacrilege.
Newton believed gravity is ontic, it is real, it has being, it exists. Einstein says no. It's geometry. So what's going on with the geometry of all the galaxies we see in all our telescopes that make zero sense unless we add in not one but two undetectable variables in order that our model of orbits works when we look at how much matter is circling how much other matter in all these galaxies, and what their movements look like.
They all look like, generally, on average, like there's way more mass in all the galaxies than meets the eye, and, everything is moving as if it's being pushed by a rocket. They say, "This much stuff is orbiting itself (it's a galaxy), and here are the detailed trajectories of all the objects," and the pattern is as if all the particles are being accelerated by rockets, outward. And that's even if they have zero mass. Like, even if they had zero mass (meaning all the stars are unconstrained by gravity), they still shouldn't be flying away from everything else as aggressively as this. There's more energy than just "no gravity."
So to make what our telescopes line up with Newton, you add in dark matter and dark energy to his equations, and voila, Newton explains everything, he just needs to propose that the Universe is over 95% INVISIBLE AND UNDETECTABLE meaning it's possible none of this stuff exists.
So rather than do all that, this fellow is saying how about we just ignore the idea that gravity exists, because it's just as likely God is in direct control of all motion except for free will like me and you. He quotes Einstein, saying in math that gravity is only geometry, so therefore gravity doesn't exist, but Einstein doesn't solve the problem of the galaxies which are all spiraling the way they do, and the Webb telescope is only revealing more and more of these objects in the night sky, they are all inexplicable on Newtonism (but not necessarily surprising on the idea that gravity is fictional) without 95% (19 parts out of 20) of the Universe being by definition invisible and undetectable. Oh, and the proposed mediating particle for gravity also happens to be so minuscule that we'll basically never be able to build a measurement detector massive enough for it to work. How convenient is that? It's Wizard of Oz pay no attention to the man behind the curtain wizardry.
