There aren’t “large swaths of thr earth” that aren’t inhabitable because of nuclear. Nuclear kills less people than coal mining - where hundreds of people dying during one catastrophe happens. Renewables aren’t a solution for every country either and cover large swaths of land you mentioned. Hydro also has a huge effect on the environment, despite being the “most green” solution (unless you count the concrete needed to build dams).

Nuclear should be the default. It’s not “profitable” for the people building them who think short term.