I think more than tragedy of long life, this is gameplay mechanics in action, as far I remember, Dahlia has very strangle tastes, and the main character has the ability to teleport back to his home (Which looks exactly as that panel 4 as far I remember)
I don't think so, there'd be no point in making the bedridden character look so visibly aged and ragged if it were just going to end with a "Your taste sucks, I'm out" gag.