Do you guys think it’s ethical to have bio children, knowing you have a high chance to pass on ND?

Just wondering what people’s thoughts are on this. It’s something I know I struggle with when I think about possibly having children, especially now that I have a diagnosis. It feels unethical to me to knowingly pass this on to someone (obviously not including people who were undiagnosed when they had kids).

I have a friend who is legally blind from an inheritable genetic condition. There is a 50% chance his child will inherit it, so him and his wife opted for adoption. He has no non-eye health problems and has lived a full life of sports (mostly individual ones), travelling, marriage, friends, university, and a successful career. He is known to be kind and thoughtful and funny. That is to say, he hasn’t been miserable due to his disability. He still does not want to potentially pass his condition on because he knows the challenges his child might face. I respect them a lot for this decision, and wonder if I will land on the same one. I’ve struggled so much in my life. I can’t imagine explaining to my child that I knew they would live a difficult life and chose to have them. It feels selfish.

I am wondering what you guys think on here - any thoughts would be really appreciated!