Simone Aspis of the British Council of Disabled People said: "Euthanasia for disabled newborns tells society that being born disabled is a bad thing. If we introduced euthanasia for certain conditions, it would tell adults with those conditions that they are worth less than other members of society."
This seems to confuse two kinds of assessments: utility and moral worth. It could be true that disabled people typically have less fortunate lives, without thereby implying that they are worth any less as people. It certainly doesn't imply treating disabled adults with less respect, according their interests less weight, or anything of that sort.