A lot of this dives deep into wishful thinking territory. We will need to spend trillions of dollars to make a pure renewable energy solution viable. People will find out that nuclear is not magically guaranteed to be more expensive. If it wasn't the case, why are new nuclear reactors still being built and more are being planned?
Germany is definitely rethinking it's anti-nuclear position. Ignore the viewpoints of the current political group in charge. They are deeply unpopular. Politicians outside of that group are advocating for a return to nuclear.
France is keeping and building more reactors. This is not a "more complicated story." It is simple proof that nuclear is viable.
Nuclear is really just metal in a big water tank. The cost comes from trying to maximize safety. It can be cheap if we mass produce it. People are pretty much engaging in special pleading every time they declare nuclear to be uneconomical.
If you really believe that, then you'd support nuclear power. It is extremely safe these days and is a much better option than to deal with more climate change. You want more options, not less options, in this fight.