Elrond and the 'Star of Hope'

Guess what! It's feeling sad about Elrond time!
Specifically, Earendil's star is also called Gil-Estel, 'star of hope'
Because it was a sign that the Valar were actually paying attention to Middle Earth, and that you could leave Middle Earth, and it heralded their army coming, and he slew Ancalagon
But that's not how Elrond sees it
When the star first rose, he knew that his mother was very far away and wasn't coming back anytime soon
And then he learned that it was both his parents and they were never coming back
And if course the Silmaril is the thing that Maedhros and Maglor destroyed his town for, and later abandoned him for
So Elrond's association with Gil-Estel is 'a sign the people I love are gone forever'
People probably tell Elrond how nice it is that his father brings hope to so many people
He isn't going to ruin a good thing for everyone else, and gives a polite thank you.

Earendil knows he's a sign of hope and tries to shine brighter and longer when his kids are going through tough times

When Elros dies, Earendil shines brighter than the moon from the first moment the sky tints pink to the last blush of dawn leaving.
He wants to show that he cares, that he is paying attention, to remind Elrond that he's not alone
Elrond really wants to go hide in a cave.