Beside the Fukushima and Chernobyl disasters, you can add the India Point and Three Mile Island near disasters. I think there was one in Great Britain early on, and if one is avoided in Zaporizhzhia, it will surely be a miracle.
That said, and I'm not an expert on the subject, but I can see where nuclear energy would certainly help if we could do it properly.
People are working on safer means of cooling the cores, a problem that's really at the heart of the problem. Bill Gates has a project in Wyoming using a sodium cooled reactor that solves one of the major problems with water cooled reactors, namely what happens when the water supply gets interrupted.
There's also the storage of spent fuel to consider. Again, I can't say I'm an expert on the arguments.