Let's avoid the religious debate and assume Evolution is real
The prime drivers of evolution are
1) Random gene mutations
2) Survival of the Fittest/Natural Selection
The issue I see is that humans actively fight against natural selection/survival of the fittest...
We have hospitals where we treat down's syndrome, cancer, epilepsy, and all forms of mental and physical retardation
Without intervention, these "bad genes" would die and leave the gene pool... but, we keep these people alive, to pass on "bad genes" to the next generation
I know it sounds callous, etc., but it seems like a stupid idea to fill the gene pool with "bad genes", rather than let nature take it's course and kill off the poor bastards who drew the short straw
If a dog breeder had a dog with an obvious deformity, it would not use the dog for breeding purposes... that would be stupid to contaminate the breed's gene pool
Well, some of the people now a days are not thinking straight they just burst their minds into some crazy thinking but really they just can't think of a way to have a good idea to that certain problem but to create it even more dangerously but really i think of that bad genes is really dangerous.