Yeah, it's hard to tell when someone doesn't do something because of poly, or busy lives, or because they're just insensitive and maybe a little bit selfish.
I have to admit, I usually visit people in the hospital more out of guilt and pity than true compassion. Selfish-only-child-syndrome.
Another issue, a lot of people REALLY HATE hospitals. Obviously the person checked-in isn't so crazy about it either, but a lot of people just really can't handle them. So some people will only visit if it's a life-threatening thing where it might be their last chance to see the patient. Personally, I've always been a little fascinated by hospitals and they never bothered me. I like being confronted by mortality, it reminds me to appreciate life.
“As I am sure any cat owner will be able to tell you,
someone else putting you in a box is entirely different
from getting into a box yourself.” —bisexualbaker