Your statements are inaccurate to a degree that they may as well be false.
Only 30% is gas. 70% is not gas. Renewables are growing extremely rapidly, now at over 25%. In the medium and long term Belgium is aiming to reduce its use of gas as much as possible.
Also, there are two nuclear power plants, not one.
Betting on gas, be it a stove or something else, is just stupid.