No dude, variation of base organisms directly supports evolution. How do you think things evolve? You realize every individual is genetically unique right? Genes from each parent combine and create a unique combination for the next generation. Through natural selection, genetic drift, and mutation the base species experiences evolution. Once you have enough speciation occur, and enough time passes, the ancestors of the observed species can appear to be 100% different from what you end up with. I don't understand how people can understand that a species will continue to adapt and split up based on natural selection like a family tree as time goes forward, and think the same thing didn't happen in the past.