Also, it must be administered to children. It's not a cure for adults. So the implication is that parents find something wrong with their own dwarf children. Someone once said "All dwarfs are bastards in their father's eyes." which is surely not true but still, you can imagine how this could be a sensitive topic. It seems to be much clearer if you only look at it as a treatment that prevents a whole bunch of other problems that are likely to occur later in life but, you know, humans don't always look at things in the most sensible ways.