[pdonis]

> people will make mistakes building the new ones, including the failsafes

Mistakes during building can be caught and corrected by appropriate quality assurance procedures before the plant is put into operation. That is standard procedure on any construction job. That's very different from human error during the actual operation of the plant.

> People will be responsible for that maintenance, they will screw it up.

And such mistakes can also be caught and corrected by appropriate checking procedures before they cause a problem in actual operation. That is standard procedure for maintenance on any industrial plant.

> the idea that human error will be entirely removed

Nobody is claiming that human error can be entirely removed. But it is certainly possible to design systems so that the unavoidable human errors can be caught and corrected before they cause more serious problems.