I think those with inherited problems that can be seen remind us of the deformities of our own souls, hence the reaction.
My nephew has Williams Syndrome plus had a stroke the night before his open heart surgery at 2 years old. He loves music and plays video games when not working. My sister is a saint.
There is so much beauty in God’s creation and in those society deem less than perfect. Your family is blessed. Keeping you in our prayers.