The Logical Inescapability That Some Genes, Cultures, and Personal Beliefs Are Better

Let's say an individual wishes to pass on her or her relatives' genes, cultures, and personal beliefs to future generations because:

1. variety merely for variety's sake is good (false). 
2. genes, cultures, and personal beliefs are equal, so it makes no difference who procreates (false).
3. everyone has an ethical right to spread their seed (false).
4. that's the way she rolls (circular).
5. some future environmental fixes will make life superb even if people who do terrible acts do most breeding (false and almost certain to lead to worse environmental changes).

Every other claim that does not rely on some things being better is likewise fallacious.

We now have a large percentage of the population inconsistently willing to avoid procreation to prevent inherited genetic disorders on behalf of eugenics but who reject eugenics where eugenics would be massively beneficial.

So calling better things better isn't supremacism. It's simply facing facts. Supremacism is demanding logically unjustifiable preferential treatments for groups, for example, bombarding some groups with slurs while demanding some other groups be off limits to even well-reasoned criticism or supporting self-determination for some groups while denying self-determination to other groups. White self-determination is both a right and duty supported by overwhelming evidence, not supremacism. Demanding a group be enslaved or otherwise exploited is supremacism.