Russia was reusing a government reactor that wasn’t designed for the it. The US has had one major incident out of over a 100 plants in operations for decades. Japan faced an earthquake that was an order of magnitude higher than anyone planned for and still managed it very well given how badly it could have gone.
I have gotten to work on a few small projects in the nuclear sector they make the government and pharm look efficient and risk adverse. Just a tiny taste of it: all tape used on wires had to be a specific brand of tape and not only no splicing no terminal blocks either. Wires had to be run fully point to point. We are talking football fields of distance a single set of cables had to be run.