Renewables solve a different problem though. There aren't great ways of storing energy on a large scale. So you end up needed two components to a grid - a baseline that you can scale up whenever (coal, natural gas, nuclear), and a renewable component. Saying that nuclear is the safest in regards to a baseline energy load is a valid argument to make.
Mechanically we have the perfect solution to storing power - reverse hydro. Pump up into a reservoir while the grid is full of renewables that you drain through turbines when the renewables drop off. All the logistics are solved problems, it is mostly a matter of just paying to transition to it:
* The grid itself would need a dramatic rework. It needs renovation for renewables in the first place, but introducing a hydro base load solution increases pressures on existing infrastructure.
* You need enough solar / wind volume to justify a sizable centralized investment in such a power solution. But broad wind/solar causes problems involving peak grid load well before you even start building these things, along with the aforementioned grid updates, make a real chicken and egg problem.
Hydro storage facilities are also vulnerable to extreme climate, take a long time to build (especially in countries where bureaucracy makes building anything take 10x longer than it should) and aren't expandable.
But they would work, easily, to solve the power storage problem. Hail potential energy!
