The concept of nuclear fission for power stations is the same as for weapons. It is only how enriched the material is that matters in that respect. ( From memory ) ergo, the only way the premise makes any sort of sense is to claim we cannot enrich the radioactive material enough. Or perhaps an inability to detonate? That's a different claim, and still wrong. We can. The seems to be a weird trait for the human mind now, whereby if someone can't understand something, they tend toward believing it to be fake news, rather than trying to understand it. We are so fvcked 😂