The question is a bit odd if you are human, but let me explain this in short terms.
Modern lifestyle has stripped many of us of essential, real problems. By far not all, of course, but definitely the generally well-paid IT crowd on HN.
So instead of hustling to survive like a maid in 1929 Berlin (I am watching Babylon Berlin right now) what's left over are luxury problems, especially if you're in the double income no kids crowd. What the Internet calls "first world problems" but even less "important". Just pull yourself together after all, right? (the answer is no, this will of course break you, or anyone, in the long run but that's a huge off the rails discussion).
What side project can I have? How can I fill my day with something useful instead of gaming? There is a profound emptiness for some people. The vast majority of jobs aren't as amazing as you are supposed to pretend in interviews. You stop feeling useful and doubt your place in society. Educated, trained but not applied to something that makes sense.
Do I have to feel guilty about gaming because I am not productive after 6pm or should I invest time to develop myself because HN tells me to? After spending 8 exhausting hours at my job that lines someone else's pockets?
This is where your mental game is played after the "real" problems are not a threat anymore. It's hard for struggling hard working people who bust their asses to pay rent to understand. I know because that's been me. I have seen both sides.
Going to bed anxious because some huge bill just arrived. Now I am going to bed thinking: "what am I even here for?"
And I actually enjoy my job. But in the end I am doing something shallow, something useless. Not advancing humanity or something.