Perhaps the reason is that no one can jump off a 20 story building and fall upwards. Perhaps because some 200,000 people in Hiroshima and Nagasaki have shown that relativity is a fact of life (or death). So tell us what incontrovertible evidence can evolution give similar to either of those two theories?
Once again, you demonstrate your limited grasp of science. I'd be willing to bet that you haven't the faintest idea what Einstein's Field Equation really means, and probably couldn't even write it down on paper.