“Additionally, not marrying someone out of concern that they will pass on a trait to your children is quite ridiculous. Again, this is based on an attitude that we have more control over our lives than G-d does. Plenty of perfectly healthy parents have children with ‘something’- this is out of your control (oakandfig).”
This is in Torah right? When what’s his name didn’t want to have children because he saw that his son would live according to his yetzar hara and Hashem said that it’s not his business to make such choices. He must have emuna.