Yes, your proposal would have been an acceptable approach in 1990. Instead, we have been happily increasing our CO₂ emissions every year since then*. No, we no longer want diversity in the power grid; "reasonable" solutions don't move the needle. Even if the entire world would go carbon zero overnight, the global temperature would continue to rise for decades before settling around a new steady state. It's not a matter of holding out a bit longer for tomorrow's magical solution: every piece of fossil fuel burned today makes the planet more unlivable tomorrow.
We are currently on track to reach the "climate-compatible" scenario of the Paris accords (+1.5°C climate increase by 2100) in 2030. We will exceed the "minor change" scenario (+2°C) in 2050. Those targets are already locked in, they are unavoidable because of the delay between CO₂ emissions and their full effect. Maintaining our current levels of emissions gets us to 3.5°C above historic averages in 2100, which is the lower end of the disaster scenario in the Paris accords.
* except for a short drop in 2020 due to Covid. You may not like it, but that is what full climate change mitigation looks like today because we didn't act sooner.
We are currently on track to reach the "climate-compatible" scenario of the Paris accords (+1.5°C climate increase by 2100) in 2030. We will exceed the "minor change" scenario (+2°C) in 2050. Those targets are already locked in, they are unavoidable because of the delay between CO₂ emissions and their full effect. Maintaining our current levels of emissions gets us to 3.5°C above historic averages in 2100, which is the lower end of the disaster scenario in the Paris accords.
https://royalsociety.org/news-resources/projects/climate-cha...
* except for a short drop in 2020 due to Covid. You may not like it, but that is what full climate change mitigation looks like today because we didn't act sooner.