Babies are still created from race mixing.

This is not accurate.

The end result are still abominations with severe health issues. Such as the higher difficulty in finding organ/bone donations.

https://caamedia.org/blog/2018/11/15/mixed-match-focuses-on-need-for-multiracial-bone-marrow-donors/

If you race mix long enough, you also get countries like Brazil. Which is 100% dysfunctional.

There's also a famous quote by Hitler explaining why race mixing is still wrong.

In saying this, I promise you I am quite free of all racial hatred. It is, in any case, undesirable that one race should mix with other races. Except for a few gratuitous successes, which I am prepared to admit, systematic cross-breeding has never produced good results. Its desire to remain racially pure is a proof of the vitality and good health of a race. Pride in one's own race—and that does not imply contempt for other races—is also a normal and healthy sentiment. I have never regarded the Chinese or the Japanese as being inferior to ourselves. They belong to ancient civilisations, and I admit freely that their past history is superior to our own. They have the right to be proud of their past, just as we have the right to be proud of the civilisation to which we belong. Indeed, I believe the more steadfast the Chinese and the Japanese remain in their pride of race, the easier I shall find it to get on with them