The culture of fear actually makes sense because, in a feudalistic reputation economy where you can spend months dealing with the fallout of a bad reference or a business failure, there is a lot to be feared.
I feel like a lot of people put these manic "I quit my job to do a startup" posts and put them on HN and get lots of kudos. No one writes, "I'm 33 and answer to a 26-year-old 'tech lead' and I have no savings; that's how much my three startup failures have fucked up my life and career." People talk a good game about their successes, but failures are embarrassing, messy and complicated and almost no one is willing to share a full story over one of those, especially if they involve other people. (That's understandable, but it's still biased reporting.)
The unfortunate truth is that we really don't live in a world where that kind of cavalier attitude toward failure can be afforded. That's especially true given how rapidly age discrimination becomes a problem for us.