You're blowing the argument out of propertion. Its possible to fix a car, and therefore the fact that you can fix a car necessitates that cars exist and can be fixed.

Evolution does not necessitate that its mutually exclusive to outside influence, nor does the state of life on earth necessitate that they've been derived via evolution. In fact, the very fact that we can manipulate genes proves that principle, because you can create something by means other than random mutation. The fact that evolution doesn't reconcile against itself is why you cannot claim what you're claiming as knowledge.