I think the knock-on effect of making some innate, human characteristics undesirable is probably a net bad. That's very close to labeling persons with those characteristics as sub-human--specifically due fewer "human" rights.
That said, if I were choosing between gametes or embryos and had genetic information on them available, I do not think it is a moral stance to ignore/discard that information when making the choice. We should be careful to understand our genetic knowledge is still quite limited and, even if our knowledge was perfect, (most) genotypes are not destiny.