> A country that goes all in renewable is in a stronger position.

Depends on the country.

> UK power grid doesn't give a fuck about this war.

Power grid =/= economy. You're missing the point. Rising prices affect the United Kingdom economy even if it was fully run on renewables. The ships bringing products to the country don't run on renewables, the cars mostly don't, your fighter jets don't, your fertilizer doesn't. &c.

It's important to not be dogmatic and be practical about this stuff. Every country on the planet needs and utilizes oil and gas and that will remain true for the foreseeable future because of globalized supply chains.

> Sure China. But unless they send in an army to retreive previously sold panels, or block the sun they can only harm future increases to supply.

Which, in the case of a war with the US would be true because the UK will be involved and sided with the US and/or certainly assumed to be by China. (This is indisputable). So sure you build up those panels, but then you see a war and now you lose access to those materials and if it isn't solved in the near term you have to switch all of your energy back to fossil fuels. No new EVs during the war, for example.