that is what Einstein imagined, and proved to be true. Today they go many times light speed in laboratories and even have the same light beam occur in two different places simultaneously. In opposition to Einstein's theories, they imagine something else to be true and prove "that" to be more accurate. Again, "imagination" is the real thing, the creative force, together with belief.
There is no "objective" reality "out there", we create it as we go along.
But it sure feels "comfy" to belief otherwise.