Or maybe there is no Dark Matter and we can't see a huge portion of stars because all of the light is being captured like a Dyson sphere. Unfortunately both of

Or maybe there is no Dark Matter and we can't see a huge portion of stars because all of the light is being captured like a Dyson sphere. Unfortunately both of those hypotheses are rather improbable, we can observe very very distant galaxies and they all seem consistent with respect to Dark Matter AFAIK.