Nah. I judge myself by how I progressed from yesterday, not by whether what I am or what I built is useful to others.
Is keeping a diary pointless if you're not planning to make it a memoir?
Is staying healthy pointless if you aren't using that health to compete with others?
It's hilarious to me that the author calls the cave "grinding", when to my eyes the "grindset" guys are the ones always trying to very visibly compete with others about wealth/status/women.
I've never heard of some guy trying to build the best Rimworld colony (in what is probably a very cave-like setting, no less) try to portray it as grinding.