If it was the only alternative nuclear power would be a solution to reducing coal and gas, but there’s no point building nuclear reactors if the renewables are better in almost every way. Solar + Wind + Batteries are faster and cheaper to build, require less specialized skills and materials, easier to get approvals for, cheaper to run (doesn’t use any kind of fuel), lower emissions, better safety, more distributed (with the advantages that come along with that like being more fault-tolerant, etc).

Looking at generators all over Australia, Solar, Wind and Batteries are just popping up everywhere partly because they’re cheap and easy to build and run.