Actually this is correct but something that supports this point is the: Cosmic insignificance therapy - https://tim.blog/2021/12/15/the-liberation-of-cosmic-insigni...

In the end, everything is pointless and it can be either depressing or liberating.

So all you described - just do the things that you feel are enjoyable or meaningful - it doesn't have to be a startup, it can be as much as caring for elderly or even running naked in the forrest, whatever it is.