It's not about money, but about replacing the coal and gas power plants. Renewable sources can't do that alone, they need massive energy storage facilities (which so far do not exist).
Because storage isn't tax credit incentivized, at least in the US. Coal still is. And FYI California will install 1.3GW of storage this year, and a storage tax credit is likely by end of this year. It's coming. Hopefully we find something more elegant or ways to recycle storage/battery materials.