Well... I wouldn't say it "cannot be done"...
more likely... it "cannot be done with our (comparatively limited) understanding of how the universe works and our (comparatively limited) resources at our disposal"...
Likely, it is possible to break even the most fundamental of the laws of the universe... just that it is not within our power to do so at this time.
Well, I must point out that you're simply expressing an opinion. And I dislike having to say so, but it's a hopeless thought given what hundreds of years of scientific experience has taught us. For example, gravity just *might* one day reverse itself and things will start falling UPWARDS. But I wouldn't waste even one micro-millisecond waiting around for it to happen.
I suppose you have the same thoughts about entropy, eh?