But doesn’t China have the largest rollout of solar in the world?
The #1 increase in world electricity demand is people rising out of poverty. China has been producing the most solar in the world and still hasn't been able to cover their own demand increase with it. Eventually that form of growth will slow down. Sustainability should always look at the second derivative.
Also need to reduce use of coal in steel production too, yet.
Australia is experiencing this problem now to a limited extent, and is walking in to a disaster scenario with the scheduled shutdown of 5 gigawatts of coal fired electricity generating across three sites over the next three years with nothing in the pipeline to replace that 5GW.
Like it genuinely sounds like you're suggesting our current terrible system shouldn't even be attempted to be improved unless there's a magic perfect solution to replace it.