I think that HN has a lot of people who are working on large software projects that are incredibly complex and have a huge numbers of interdependencies etc., and LLMs aren't quite to the point that they can very usefully contribute to that except around the edges.
But I don't think that generalizing from that failure is very useful either. Most things humans do aren't that hard. There is a reason that SWE is one of the best paid jobs in the country.