Generally , a child with Downs remains a dependent for life. I have taken care of a person with Downs Syhdrome in a nursing home. He was cared for by his parents until the parents became senile and went to nursing homes themselves . Only then did the parents institutionalize their 50 year old child. What commitment! 50 years of caring for one child.
God thinks it's fun to confuse primates. Larsen's God!