I don't support forced sterilization.
Grinity
I support everything you said, except that one.
We have friends with a mentally handicapped daughter who is now 35. She has lived in a group home for about 10 years now. They had her sterilized before allowing her to move into the home. (She wanted independence from her parents but couldn't live on her own.) She has a limited capacity to develop a long-term relationship, but she has full capacity to give and receive physical expressions of love. She does not have the capacity to care for the results of that ultimate expression of that physical love.
Then there are the women who I'd like to forcibly sterilize because they recklessly produce children with unknown men and with no means to support the child. Grrrrrr