One does not need to think that others with less desirable characteristics are less worthy of their own existence just because those characteristics have an identifiable genetic cause. That people are mean to each other - because some are dumber than others, or less pretty than others, or can't run a mile in under 6 minutes - is not a reason to restrict research into what makes those things possible, it's a reason to be more vigilant about virtuous behavior.
One does not need to think that others with less desirable characteristics are less worthy of their own existence just because those characteristics have an identifiable genetic cause. That people are mean to each other - because some are dumber than others, or less pretty than others, or can't run a mile in under 6 minutes - is not a reason to restrict research into what makes those things possible, it's a reason to be more vigilant about virtuous behavior.