I actually think your point is a good one. As for ge experience argument - it's hard to evaluate, so I don't think that's the main reason. A major reason is s

I actually think your point is a good one. As for ge experience argument - it's hard to evaluate, so I don't think that's the main reason. A major reason is simply risk aversion. Years of experience is an indicator (a misleading IMHO) of safety, if the guy you hired who has 10 years of experience screws up, you can explain it away by attributing it to bad luck. If the guy ou hired with little experience screws up then it's his fault and your fault for hiring him. A lot of it has to do with how we explain success and failure.