You can buy it on a black market unlike electricity.
For example, a president of a certain country threatened to make a "power plant day" in another certain country.
With the renewable power revolution, do you think solar panels and batteries are going to be more or less centralised than oil extraction, transport and refining?
Are you familiar with how easy it is to repair the electrical grid after damage, compared to what happens to oil wells whose operations are stopped?
OK, but is the argument that oil refineries don't get the same treatment in war? They're also "large, centralized, easy to destroy". In fact highly flammable. It has been happening, not theoretically but actually.