Evolution does not work that way. Evolution does not refine beyond what is good enough, it does not refactor. Genomes do not adapt, genes which encode phenotypes that are best at getting its owners to maximize reproduction with respect to an environment are selected for.
Most importantly, if we could cure aging and necessarily cancer, then you can bet we would have the sophisticated understanding of genes, proteins and cells required to fully control our genome.
Most importantly, if we could cure aging and necessarily cancer, then you can bet we would have the sophisticated understanding of genes, proteins and cells required to fully control our genome.