It is about supply and demand. If stations start charging too much, then people will charge more at home. There is no similar thing people can do if gas stations start charging too much.
Electricity gets you options. A lot is made that you can get electricity from gasoline easily, but think about this: can you get gasoline from electricity? If you do not have easy access to electricity through the grid(rare, but possible), you can easily use a portable generator to generate electricity from gasoline. If you do not have gasoline, but are connected to the electrical grid, you still do not have gasoline. If gasoline prices go up, but you still have cheap hydro electric power, you are going to have to pay through the nose for gasoline.
And if the oil companies who control how much the gas stations can charge jack up the prices, you are stuck paying higher prices or going nowhere.... Assuming you do not have an electric car.