The song includes these lyrics:
"So we open up a quarrel
Between the present and the past
We only sacrifice the future
It's the bitterness that lasts"
H lost a parent unexpectedly, so I honestly am surprised, especially in light of KC3's cancer diagnosis, that H has not put more effort into trying to reconcile with his father. As much as the palace line is "Keep calm and carry on", an adverse reaction means they have to change the treatment protocol...which is never good news.
It is a very lonely conversation for an orphan to talk to a grave. I hope that somewhere in California there is someone who can sit H down and encourage him to make peace with "Pa", while "Pa" is still around.