Critical? Yes but there are a few different kinds of critical. Critical to the power supply? Ofc. Critical as in potential environmental disaster? Some, dams are 1 example.

Sometimes transportation is the cause of the potential of an environmental disaster like gas pipes. Those are a potential wildfire. Tbh, badly maintained high voltage over the ground wires have caused huge disaster too.

Energy is dangerous by nature. But some are more abusable and have longer term consequences than others. In a war setting, you have to assume abuse and plan with the consequences in mind.https://en.m.wikipedia.org/wiki/Zaporizhzhia_Nuclear_Power_Plant_crisis it is a reality.