Someone unqualified to access the safety of nuclear power plants declares them unsafe.
Did you bother to even skim the article? It was essentially entirely focused on human and organizational risk factors, the sort of thing that anthropologists do actually study, in US nuclear facilities and preferred methods of securing them.
My experience has shown that who humans interact and the operating environment they work in is generally the most significant root cause of an undesirable event. Technology may compound the severity, and in some case there are technological flaws that case or contribute but generally the operational environment setup the conditions for failure. For example, a rigid hierarchy in a cockpit leads to fatal error going uncorrected since a junior person is unwilling to call a superior's judgment into question or the captain ignoring the comments of junior officer; the US aviation industry introduced cockpit resource management to address some o those issues.