You are ok with a bridge collapse every 10 years? Do you understand how rare bridge collapses are today and that this would be a massive increase in the rate of failure?
They were just giving their personal comfort threshold.
I mean, technically, one would need to look at the reliability-cost curve. opwieurposiu would almost certainly be fine with eight 9's of reliability if it only cost twice as much as three 9's. The fact that they have a really high risk tolerance in this area don't really undermine their general point.
If a person’s risk tolerance on something is out of whack of what almost everyone else is comfortable with then there is a problem with that position. At least as it pertains to public policy. I’ll rephrase and say that I hope OP is not in a position to have his/her views in this area become policy.
I mean, technically, one would need to look at the reliability-cost curve. opwieurposiu would almost certainly be fine with eight 9's of reliability if it only cost twice as much as three 9's. The fact that they have a really high risk tolerance in this area don't really undermine their general point.