It's my theory most people inherently know the truth behind eugenics is correct but abhor an implementation which harms, rather than just separates, the weeded. That's why voluntary sterilization is so highly praised in the west today. For example, how many of these have you seen promoted recently: Growing old alone and playing video games or engaging in other frivolous behavior, "becoming trans", having abortions, or couples just choosing to have no or few kids.