I'm not sure what that means. Are you pointing out a severe deficiency that makes their whole operational record somehow moot?
Whether or not you consider this a severe enough deficit to necessitate a shutdown is a matter of policy.
As to any operation record, just keep in mind that the Fukushima Daiichi Nuclear Power Plant had one dating back to 1971.
A lack of air bags is not noticable until your car crashes.
The question is if we nevertheless deem them 'safe enough'.
It is, because it is also a tautology. To me it has no bearing over the point we're discussing.