I interpret it as there are more degree holders than there are jobs that closely align with that degree. Graduating art history majors are absolutely qualified to be curators at galleries and museums, but there are only a handful of those positions available.
How does the graph not show that? The chart clearly shows there are a lot of degrees whose holders have “insufficient jobs for their training.”
I.e., they were unable to find jobs that utilized the skills they got with their degree. The skills are not sufficiently transferable to jobs.
I interpret it as there are more degree holders than there are jobs that closely align with that degree. Graduating art history majors are absolutely qualified to be curators at galleries and museums, but there are only a handful of those positions available.