I think the movie did a pretty good job of showing that he wasn’t the inventor of the atomic bomb. The moniker has always been “father” of the atomic bomb, since he was more of a supervisor and manager than a deep researcher at that point

Because I don’t want to stay in the city all the time?

Yeah unfortunately as cultures get air conditioners, they can take more heat as a society, but individually most people don’t ever truly be hot adapted. Then you get a place where people run from their ACd job to their ACd carto their ACd grocery store and finally get to heir ACd house.