You cannot separate the two. You cannot possibly portray a family's dealing with any disease without treating the subject of the disease. The audience needs to know what the family is dealing with. We see Diana suffering from a disease, and everything she has to go through living with it. Perhaps that point eluded you.
And no, I did not miss the point of the show. My family has been living the show for over 50 years.
Because this topic is so meaningful to me, I'm going to stop providing entertainment for the troops here and leave the discussion. I've made my point.
<-----I'M TOTES ROLLING MY EYES