This was 20 years ago. The industry has shifted in and pretty big ways. As a manager for the last 10 years, I've had different experiences growing teams of engineers. Many of them have the impression that their instincts are the only ones that matter. Many people react poorly to being told "uh, no that's not right."
At the same time. Many engineers are starved for experienced mentorship where none is available. There's nobody else to talk to about whether their estimates are any good.