Yeah, no.
Russia had been a "bad neighbour" for over two decades now. In terms of energy policy, worse than Soviet Union (there's reasonable argument that they traded on relatively stellar reputation soviets made when it came to energy supply to the West).
Cheap energy is not everything, and I do not mean here some nebulous (to some) concepts of decency and honour. I mean physical and political safety of the citizens. Several EU countries border Russia. All of them have history when it comes to Russian nationalism (which coincidentally is pretty big in Russian government). And Russians aren't quiet with their saber rattling. Appeasement only results in confirming that threats work to get you to comply, after all.
If anything, the current increase in combat was a wakeup call that "Wandel durch Handel" was a total failure with regards to Russia. For decades, belief in "Change through Trade" constrained possible actions to ensure safety and wellbeing of EU citizens, against belligerent who was all too happy to manipulate energy access to cause issues. Not to mention significant portion of the fossil fuels from Russia... flowed through Ukraine.
So if anything, diversification from Russian gas was at most ripping the bandaid out, something that should have been initiated at latest in 2014 (when it was proposed by Poland), but it was not the first attempt to do so. Pity it took 8 year war kicking into higher gear for some to finally understand.