Along with Death, it's the most used theme in all music, so you're not off-topic at all.  We have to believe in it -at least in theory- or we can't do justice to the songs.  Experience may tell us otherwise, but if we don't continue to believe, we may as well give it all up and sell double glazing.

There are always young people who affect cynicism to make themselves seem more grown up (I did it in my time, like many others) but it's so often just a pretence to protect themselves; they're frightened by it.  If you can manage without that, you'll grow up a lot quicker than they will, and will probably be happier.  Good luck.

Malcolm