I'm not reassured that this field has an abundance of such people, or that they are effective when the situation arises.
That may be true but working for SS I was involved in decisions like this and believe me when I tell you SWs, psychologists, therapists and carers agonised over these decisions. 3am, can't sleep, trying to see a way something could be done that wouldn't harm people or end up with serious abuse or death. All without half of the information because people lie to SS all the time. And with a caseload of real people that are all urgent because you don't have just one case at a time.
The realities of these situations are murky, open to interpretation, half-hidden and ethically impossible. And there are real people suffering. Having an LD doesn't make your pain less or your horror at losing a child less or your desperation to have a relationship less. It does mean you have less power though.
Imagine being madly in love with your BF, who also has an LD and a SW comes along and tells you you aren't allowed to see them any more. He's your only friend, you enjoy being with him. You don't have a job, school, other relationships that are equal. But some SW looked at capacity and now you can't see each other any more. And you see TV and on the street, people with happy relationships and babies and you desperately want a baby, just as much as a NT person. It's awful.