Wait a minute! Does that mean that the speed of light is not a constant? What other of our current theories will be trashed? Actually, probably most since so many are based upon theories and many can’t be proved...
Don't start. This is "settled science" and nobody will take the opinions of light-speed deniers seriously. The "new science" template requires all believed truths to remain unchallenged.
I think the speed of light already has exceptions but this has nothing to do with light traveling anywhere so it is a non-sequitur to say this affects its speed.