Why can you tell you're not the fool?

Nuclear weapons, asteroids, large scale volcanic eruptions, famine, disease, etc.

Think about it like breaking a cookie. It will break slightly differently each time you break it, and produces two major pieces (not necessarily equally sized), and some crumbs. While it is easy to break a cookie, exactly how it will break will be determined by lots of variables, so many, that measuring the statistical frequency is usually how outcomes are predicted. Some reactions require certain minimum energy thresholds to be overcome, and the energy of an incoming particle can determine how likely certain types of decay are. That being said, a neutron is actually absorbed by the 235, which becomes unstable and breaks apart. U-235 fission produces an average of 2.41 neutrons per fission, the neutrons being analogous with a seed or something in a cookie that cannot break apart easily, and so either is in one half or the other, or in neither as a crumb.

and even more so with 8k

8k is stupid and unnecessary.

Sorry, but treating either of those situations like inevitable problems is not accurate or useful. Look at the US Navy's track record. There are 15 reactors in Pearl Harbor that no one bats an eye about, but if you suggest swapping nuclear for Oahu's fossil fuel based power generation, the public would lose their minds. People need to remember that nuclear isn't the villain

Cold fusion is not really as game-changing an improvement over fission anyways, tbh.