Call it a vibe. I only see a steady decline in living standards in our future and it makes me pause when I think about whether to subject another human being (i.e. my kids) to that.
Realize that doom and fear porn that you are reading addresses certain type of need we have. If you overdo it well you get depression. Then again some people I know use this crap to give themselves excuse to behave like teenagers in their 30s, stuck in childhood(because they can).
*I'd argue that not having at least one child and possibly adopting others is selfish assuming one has financial means. For example, while I thought I wanted kids, upon reflection what I really wanted are mini-me's. If I could buy a clone I'd do it immediately, but child roulette?, no thanks. My selfish lifestyle had made me very happy so far and that feels like a character flaw.
From where I am, a "selfish" lifestyle of video games and porn replacing responsibility does not seem to be healthy long-term.
I'm in my late 20s now, and the guys I know who are not working towards getting married and starting a family are pretty much all starting to experience some sort of constant existential anxiety.
I think if you drop off the rails of a traditional lifestyle, you need to be ready to stand on your own two feet a little more when it comes to intrinsic motivation.