The problem for Germany is that nuclear power plants, wind, and solar don't product natural gas.
Natural gas can be turned into electricity, but electricity cannot practically be turned into natural gas and German industry needs a lot of natural gas.
But with sufficient baseload nuclear, one could free up gas capacity because of the lower demand for gas peaker plants. Similarly, if electricity were as cheap as gas per kWh, many industrial applications could actually switch to electrical heating.
Natural gas can be turned into electricity, but electricity cannot practically be turned into natural gas and German industry needs a lot of natural gas.