It's like there is some sort of "I tried that and it didn't work, so no one should ever try it again and if you do I'll warn you and then ridicule you for wasting your time" attitude that permeates all of some people's contributions to the discussion. This attitude isn't just at the individual level but also at the team, company, societal levels.
This doesn't feel like a hacker mindset to me at all. It feels increasing defeatist.
While I can't point to HN glory days (I wasn't here), I imagine that HN is devolving from hacker news to defeatist expert news.
But maybe it's society as a whole? I don't know...
What I can say is that the real hackers (eg builders, not speculators) in the web3 communities seem to be more optimistic than the average interaction I see here.