What constitutes a six varies from species to species and environment. A benefit in a given environment may be nuetral or a hindrance in some other setting.
And this trial and error/feedback mechanism tends to discredit the mathematicians who calculate odds that purport to show that evolution is impossible.
Or as one poster put it here a few years ago, the odds against evolution are 1720. LOL
Evolution is irrelevant. Where did the first living organism capable of reproducing itself come from? Oh yeah, this organism not only had to reproduce, it had to have a blueprint code, something to decode said code, and the decoder had to be tolerant of some mutation. And it had to absorb energy. Transform and use energy. Move energy to various parts of itself. Excrete wastes. All spontaneously from nothing. The evolutionist MUST grapple with this question, not just take it for granted and continue with the assumptions. Otherwise, the Evolution-Creation arguement is moot and meaningless. A traveling companion is the question of the origin of matter & the universe.
Do you honestly beliive life started from nothing in some hypothetical soup? Do you really believe that the complxity of the universe came about from a violent explosion of "nothing"?
Do you honestly believe a single chance mutation in one genetic sequence (one pair of dice) could find its way into the entire population through reproduction, or that the one genetic anomoly gave that one organism a leverage over it's multitude of special cousins, and they all died and that one had became the father (mother) of all? Or do you believe that several organisms had the same "random" mutation simultaneously? Moreover, that this happened a gagillion times over? Dice rolling indeed.
If you answered yea to any of the "believe" questions above, then you have faith in something you can't prove. Welcome to the club!