Nuclear disasters are becoming incredibly rare and plus a nation like the US for instance has plenty of wide open and otherwise unused land. Ask the military. So even if there were a disaster, they could be pushed far away from cities.
The only disaster in recent memory required a tsunami to cause it and its effects are very minimal. Mostly it just cost a lot to clean up which again, is miles better than the radiation from coal and spills of oil and release of natural gas. The standard for which nuclear must meet is way higher than any other energy source when it comes to contamination.
I also didn’t say that mining of other types didn’t matter. Coal has always abused its workers. Oil is bought from nations with large human rights abuses procuring it. Meanwhile Uranium is often easily accessible to nations and doesn’t even need to be traded for.
Using nuclear energy is such a brain dead easy decision. Only barriers are upfront costs and public perception.