I started writing a comment that is nearly the same as this one, I'm glad I read yours before commenting. I guess there are lots of people who think the same way. I wonder where they hang out (other than HN)
In fact, this article isn't even particularly unusual. I feel like we see more articles warning you that startups aren't heaven on Earth than articles explaining that you should try them. I think it's more like HN is a place that considers them a viable option, and that makes it pretty far out in the grand scheme of things because mainstream $X doesn't, for most values of $X.
I think "HN is full of people encouraging you to roll all the dice on startups!" is more about what people think "should" be true than what is actually true.