I believe genetic tests already exist for people at high risks to be sure that they are not(sane)carriers of deadly disease that could be passed on to their off

I believe genetic tests already exist for people at high risks to be sure that they are not(sane)carriers of deadly disease that could be passed on to their offspring. I don't think it is a wrong or morally reprehensible idea. However, in the long term, it might not be a good idea to select, and likely reduce the human gene pool, because you can not know what will be useful in the future. For example, the Spanish Flu of 2087. On the other hand, it is possible humans will become that good at genetic engineering that a small gene pool won't be an issue because we will be able to update and adapt it easily if new conditions arise.