Europe, honestly, just can't afford that, even if they wanted. This is why e.g. Germany still has to buy natural gas from Russia, even while supporting the war effort of Ukraine against Russia.
https://www.bbc.com/news/world-europe-63709352
You can see rapid progression to zero of Russian imports for natural gas in Germany if you scroll down to the info graphic in this article
https://www.cleanenergywire.org/factsheets/germanys-dependen...
Germany is also famously anti nuclear
https://www.bundesnetzagentur.de/DE/Gasversorgung/aktuelle_g...