@John53 God isn't punishing anyone personally by allowing deleterious mutations to transmit problems. But most mutations are not beneficial. So again -- how many fish does it take to mutate (evolve) to become landrovers? One? Two? continual mutations until legs and lungs develop? I haven't gone into the mathematical possibilities of mutations turning into beneficial evolutions.
What's your proof that most mutations are not beneficial?
Why does Jehovah allow any mutations?