People don't understand that, that is what the homestudy is for. It weeds out the singles and yes the couples that can't handle adoption. Beyond that these parents are commited - heck they spend tens of thousands of dollars just to bring their little ones home!
It is especially tragic to change this law mid adoption for some - with children with special needs - who will soon be sent to an intitution - an institution where 80% die within one year!
see my post about "why singles shoudl be allowed to adopt" to see a certain little one who faces this reality!