The fact remains that the coal plants that replace the German nuclear plants emit more radiation than the nuclear plants ever did. Nuclear isn't being abandoned because of economics, it's because of fear. Irrational fear at that, for many European countries.
There have been two serious nuclear incidents that have rendered land uninhabitable. One was a Soviet reactor that was already outdated at the time it was put to use, the other was the result of a tsunami. The entire field of research has been put on hold since Chernobyl, but the problems that caused the disaster have long since been solved.
Nuclear reactors have several advantages over solar and wind. Not taking up as much space, for one. There's also the ability to work during windless nights without having to install massive battery arrays.
The existing energy grid also isn't prepared for every house generating their own electricity. I know of several cities that simply refuse to connect more solar panels to the grid because the load cannot be distributed. The necessary expansion and reconstruction of the grid is planned to take about thirty years if work starts today.
Solar is great if solar panels are in constant use for over ten years, but advances in technology and deterioration of the panels themselves make many money wise consumers switch out their panels much earlier, sometimes even before they've earned back their production and transportation costs. We're just offsetting the environmental damage, moving it to mining and production facilities in China where we don't have to care.
Wind is the only green technology that I think is actually green enough not to be ruined by private economic incentives, but the NIMBY factor is huge. You're right that Europe is densely populated in comparison, and you need quite a lot of distance from the giant blades to not be affected by the many stressor such plants create, like the constant whooshing, the moving shadows and the constant low hums that come with most of them. Placing them at sea is a great solution for all of those problems, though.
There is no holy grail in energy. We'll go solar if price is more important than the environment, wind if availability is more important than the surrounding inhabitants, or coal and gas when we just need power without all the complaining.
Meanwhile, we'll always be planning some nuclear plants in Europe, because hospitals need radioactive compounds. The current ones are deteriorating but they have to keep operating because nobody wants to build new plants, but at some point we'll either have to build some at some point or not offer certain kinds of care in certain areas anymore.