Beyond the concept that you are, in effect, still adding one, the point is that we may understand physics (and life, and the universe) in ways that are not necessarily wrong, but not necessarily right, either. What if our understanding of physics now is EXACTLY how the entire universe is based, except for certain conditions which we are unable to create / replicate / perceive? What if there's special conditions out there that allow you to use re-written physics? It's definitely possible, who are we to say its not? How can we possibly say its impossible to do things, that may be possible with other methods that we have no way to know (at least not yet) exist? That's akin to saying a lightbulb that isn't lit is broken just because it isn't lit up. Of course, once it glows, its fairly obvious that it works, but not the other way around.
This is where my hope for future technological breakthroughs lies. The world 'used' to be flat, and it was blasphemy to think otherwise, and they still lived life, made things work, and all was well. They had no reason to believe their 'science' was incorrect then, either
