Well, if I were one who could see, then the survivors would be as many blind people as I could feed, and myself.
Is your logic here deeply disturbing or what? I may have missed your point; but my point is that the very reason we humans want to help is evidence against the blind-non-forward-thinking-planning, very nature, of evolution!
If evolution is completely indifferent to morality (indeed, it doesn't care that it doesn't even care) then why has it gone on produce creatures (us at least) that do!
Where would I (a machine for gene survival) ever get a notion in the first place to help, if the very giving of that help might infringe on my own gene survival. (blind people will eat MY food) - Maybe helping is a bad trait that will be worked out of human evolution, what a despicable thought! But evolutionary theory allows this to be a reasonable possibility!!!
My root position, is that life is given, and that evolution is a non-starter!
thanks for your post