According to a possible Roman Catholic counter-argument, the true danger is that, in engaging in biogenetics, we forget that we have immortal souls. This argument only displaces the problem, however. If this were the case, Catholic believers would be the ideal people to engage in biogenetic manipulation, since they would be aware that they were dealing only with the material aspect of human existence, not with the spiritual kernel. Their faith would protect them from reductionism. If we have an autonomous spiritual dimension, there is no need to fear biogenetic manipulation.
(Note: souls are bullshit. But it’s an interesting avenue of attack.)