Building out nuclear plans takes years, many billions of euros, and considerable protest from wherever you install them. Installing wind and solar power is cheap and fast, in comparison.
It takes years because people like you in aggregate demand that it do so. Submitting plans, evaluations of those plans, comment periods, etc. etc. etc. only move so fast because that's how the process is set up. The process is set up to delay and deny because that's where the political winds blew at the time the process was created.
If political winds change to support nuclear then such processes would evaporate into something far more streamlined and efficient because they simply don't make any sense in the context of "we want to do this nuclear thing and we want to do it ASAP".
