pointlessly shut down their nuclear plants
So you’d rather they instead got another round of fuel rods from the russians? Because afaik swapping out those fuel rods for american designs would not have worked without redesigns of the reactors (not feasible in the time available). Besides, the plants were scheduled to shut down for a while now, some of their safety certifications running out shortly after shutdown due to those plans. Renewing those certifications in time would have been a mammoth task better spent on more renewables.
There can be a discussion about the order of planned shutdowns here (coal before nuclear) but to argue the plants lifetime should have been emergency extended is pretty delusional. Such a thing was simply not possible given the constraints present.