No it isn’t. 500 million years ago when Earth’s CO2 level was 5000 ppm, did they have nuclear power?
Is that what saved the planet to make it habitable for humans? No - the levels changed because of exposed olivine rocks that absorbed the CO2. That’s how nature fixes high CO2 levels. Why does the solution have to be anything other than that?
If humanity spent $1 trillion per year on extracting olivine, and putting those rocks on tropical beaches, we’d easily solve climate within a couple decades. It costs $21/ton of CO2 sequestered.[1] It’s easily the most affordable solution.