I too saw the show on PBS.

I'm not totally sure that "self-obsessed" is the right term for the parents, although it is at least partly right.

Both parents are and were artists, apparently consumed by their own art. The way it struck me was that they seemed to consider what their daughter was going through to be in some ways "normal" and, once they realized she was in trouble, unable to see that their daughter's art wasn't the healing "therapy" that she needed, even if might have been the sort of therapy they would have sought for themselves.