Can the water level sensor Arduino be connected to I2C interface?

There has been a lot of news about how the water level sensor Arduino connected to the I2C interface could improve the efficiency and service life of the sensor. However, in my opinion, I2C is only a hardware interface, and its output signal is an analog signal. In addition, it is only suitable for low voltage and power.

How can the water level sensor of this interface improve the working efficiency? What other advantages does it have?