I’m not depressed (at the moment, well maybe a little), just feeling philosophical.
Edit: the idea of this came to me because I was pondering why people fight so hard to beat diseases and live a few more years. What are they planning to do? Why exert effort just to be here longer when you don’t have a reason?
Just why?
Essentially I think you’re right, we are amusing ourselves. The point is that we seem to be built to do that - we come with a nice set of compulsions that give us happy feelings when we do certain things, and if those feelings are an illusion so what? They feel real.