It would be great to have that infrastructure of course, but if we're going to say "OK we need to do mammoth projects which require lots of up front capex and ongoing administrative competence", that same argument applies to old-school nuclear reactors too.

The most grating thing about the renewable fad is that "herp durp churn out more wind and solar at the margins decentralized" and "massive coordinated grids and/or huge batteries" are utterly different modes of infrastructure production. There is no sense in which getting really good at the former makes one any better at the latter.