The Michelson-Morley experiment was only done on earth.
IF the matter forming the planets was swept together by vortexes of aether, one could reasonably expect that over a billion years or so the rotating mass and the swirling aether would drag each other to the same velocity.
Any attempt to measure the speed of light relative to that differential velocity (between the moving surface of the earth and the static frame of an immovable aether) would fail as the moving mass and the aether would have long since equilibrated to the same velocity.
Same argument for the earth’s motion about the sun, and the sun’s motion relative to the center of the galaxy. We’re all being swept along with the flow of the aether.
Einstein envisioned space as being warped into gravitational wells. These are always drawn as if they are simple depressions in a perfect grid of graph paper.
Suppose those wells are not simple dimples, but are swirling vortexes of aether. Like a whirlpool on the surface of water, they’d tend to accumulate any matter floating on the surface, and that matter would tend to acquire the same spin as the surface of the whirlpool.
Easy enough to test. Do the the Michelson-Morley experiment on a cubesat or deep space probe cutting across the flow of the aether...