The problem is that you still need the infrastructure to sustain through longer https://en.wikipedia.org/wiki/Dunkelflaute . It does not matter if you have to pay the fixed cost of the infrastructure to use it once or ten times a year. If we only need it every few years things will probably get worse since politicians might try to skirt it and hope nothing will go wrong during their tenure.

I am not arguing against intermittent energy sources but we need to address these problems.