Umm oh oK again, Mr Nuts I am writing to you to ask from your respectable expertise in science, can you name anything else in science that's explanation could be attributed to space being the medium, unlike other mediums, for light?
Once more, space is just "a continuous area or expanse which is free, available, or unoccupied" so it can't be a "medium" for anything. Consider what can be in comparison:
medium
A substance that makes possible the transfer of energy from one location to another, especially through waves. For example, matter of sufficient density can be a medium for sound waves, which transfer mechanical energy.
Air: has density and compressibility so neatly transfers compressed and rarified sound energy.
Water:
is complicated, having density and no compressibility. But its very low viscosity allows the water to transfer the energy about five times faster than when using air and with high fidelity.
Space: no density, nothing to compress, no viscosity, literally nothing,.. so great for allowing mass to freely travel through, but useless as a medium, i.e. for transferring any sort of energy, wavelike or otherwise.
Aether: apparent density at subatomic level, especially near light speed, infinitely expandable and compressible but with either increasing dielectric or magnetic field resistance straying from its density and geometric norms, perfect for transferring EM energy, i.e. as a "light" medium.
The medium doesn't just make "possible the transfer of energy from one location to another." It does the whole job. It transfers the energy itself, just as air and water do by transferring sound energy from one location to another. The energy is transferred to the medium then just received at another location. That's why you need a transmitter with an antenna to match the air's impedance and another antenna reversing it at the receiving end.