The engineers who built Fukushima thought a disaster like that would never happen in the first place. When you are building these power plants on a rock full of natural disasters, from tsunamis, to typhoons, to earthquakes, to volcano, whilst knowing that averting disaster requires nothing going wrong, you are basically kidding yourself by touting how safe a design is.
If safety is truly in the minds of nuclear proponents, they’d all be promoting thorium power planets instead of plutonium.