I would rather have a world where we strive to create the best of us, rather than rolling the dice with perpetuating hereditary diseases and leaving our future to blind luck.

To answer your question : If I were born with a horrific disease that has a significant chance to pass that down to the next generation, it would be my responsibility to not pass that down to the next generation. I would understand.

There are always superior people and inferior people depending on a multitude of variables : time, genetics, intelligence, environment, training, etc. Ignoring genetics as an essential pillar of this is irresponsible.