It's technology so YES it could be used wrongly, but so can every piece of technology. In the end it would enhance our lives. And yes, all sci-fi says "no it wouldn't" but how fun would a story be if everything just went dandy?
BTW, genetic mutation would still happen if we genetic engineering was done as it is hypothesized now, so worries of the gene pool becoming stagnant is total bollocks.
BTW, genetic mutation would still happen if we genetic engineering was done as it is hypothesized now, so worries of the gene pool becoming stagnant is total bollocks.