@geekish - The reason the genetic counselor students were in the class were because with each disorder you learn about; you learn the genetics of the disorder and therefore what the research says about someone with a disorder passing it on to their children.
I think this class was specifically a good one for them to take because there is a common chromosomal abnormality that occurs within the realm of craniofacial anomalies called cleft lip and/or palate.
By taking the class those genetic counselor students will also be able to tell the family some important fact about the disorder. For example, they would be able to tell parents that children with cleft lip and palate disorder have a low percentage of intellectual disability, and I high success rate of surgery fixing the cleft.
I would imagine that being able to tell families such information will make them knowledgeable counselors and help put a family to ease when such an instance arises.
I do not know the training details of genetic counselors but I do know that the class they were in with me was a graduate level course, so that indicates some advanced training!