Supply Chains are primarily fossil based and can NOT be substituted with low density sources like Green Energy or even electricity at all.
For example, you can't efficiently make steel or most other metals with electricity alone. Even primarily electrically refined metals like copper or aluminum REQUIRE inputs that can not be made or refined or extracted with electricity. Often this is about chemical reductions that required carbon or other reductants that can't be effectively or efficiently made with electricity. The most obvious one is silicon - carbon reduction of SiO2 is the only and best efficient refining method (1st stage only - you need further far more energy intensive refining to make semiconductor-grade silicon).
Recently brought up in Congress was questions of how petrochemicals are to be produced if the Green goal of eliminating oil is accomplished. Stuff like plastics. All sorts of things depend upon plastics and plastics require petrochemicals. The most obvious one is plastic sterilization aids and sterile materials like syringes, packaging for needles, etc. ALL 20th century medicine is largely destroyed without petrochemicals. Also all pharmaceuticals deeply depend upon petrochemicals.
The respondent had no answer and she simply tried to resort to high-intensity angry BS. Clearly she'd never thought ANY of this through and didn't care because she was living off the anger of hating oil but knew nothing about how oil is used or how dependent all supply chains are on oil.
You are underestimating the good faith of the political class. In fact, they are borderline psychopathic with high levels Dunning-Kruger delusion about the correctness of their decisions/beliefs.
https://www.youtube.com/watch?v=AHk7S6prF6M
The additional issue: PVs have finite lifespan. Lithium batteries have extremely finite lifespans. So you have to replace them and have ALL the supply chains to do that forever. Which are fossil fuel dependent at fundamental chemical/physical levels. So most of those supply chains can NEVER be made green.
Green Energy is primarily a Cargo-Cult Religion not based on facts. That is a major problem because if you shutdown fossil fuels, we will end up with nothing - we will not even manage to have the levels of civilization and technology seen in the last 300-500 years. Basically a dark age.