You know, I don't see the problem here. Though the language is currently problematic, it's a valid message.
I disagree with the language being problematic, since the dictionary definition of "retard" is literally to be held back or to hold back. Persons who are mentally held back are by definition being mentally retarded. It's a valid clinical term.
It really is a shame that "retarded" became a word of disparagement and slang for those who are stupid. A word which is widely regarded as insulting more than anything else.
The other thing that saddens me is that while we have associations for people who are clearly and significantly mentally handicapped, when it comes to simple mental health for everyone else, it's often regarded as a sign of weakness. Any attempt to seek help for any mental issues is generally looked down upon. There's a large number of people who not only would benefit from mental health services but need them to lead fulfilling lives. So many people struggle with disorders that aren't as obvious and have no facilities to seek help or even a diagnosis to understand themselves; at least not without significant personal resources at their disposal, which most lack.
That whole side of humanity generally just needs a small push to get to their potential, and they are often denied a chance to get that push. Either from economic barriers, or social stigma, or other reasons. We actively harm the potential of the race, in my opinion, by allowing those people to continue to struggle with disorders they don't understand that may be able to be solved with a fairly simple prescription, or changes in their behaviors.
Given how massive this issue is and how easily it could be solved (by providing very basic mental health services to everyone who needs them), I'm continually disappointed in humanity as a whole that this is allowed to continue. This message, no matter what Barbara might say, or want to have happen with this message, it is one that should be repeated, perhaps with more modern terms, and such institutions as what is promoted here, should be maintained. There's no shame in needing help; regardless if you are someone with a mental disorder, or full mental disability, those services should be made available.