Phyddeaux is discussing:

The actor says a return to "wartime rationing" could reduce consumption and ease the climate crisis.

If you take out the "climate crisis" BS and war analogies, she's right at a societal level.
We are a fat and wasteful society coming to the end of its life. Most people could do with eating fewer calories and buying less useless junk.
The problem is the war analogy - because in a war, many unpleasant things can be justified. Climate advocacy will turn into a war-effort.