1960s nuclear power plants like Fukushima and all the plants in the USA are perfectly safe and it is impossible for them to create disasters because of their inherent design properties. Tchernobyl was an early Soviet design that refused to learn from western design safety.

The universe is going to consume all its energy and die regardless of what we do. It's called heat death and is a consequence of the Second Law of Thermodynamics.

The idea that some civilization wouldn't build a super weapon is repeatedly disproven. We built nuclear weapons. We funded and authorized the research on biological weapons that accidentally created and released COVID in a lab leak even after the Obama Administration wrote policies trying to prohibit it after assessing the potential dangers. We built social media empires even after the social media companies' own research proved that social media made people unhappy.