Why square of voltage divided by resistance is not considered as loss in transmission line where as I2R is considered as loss?

In transmission lines, the square of voltage divided by resistance (V²/R) represents a theoretical power loss if the entire voltage were to be dissipated across the resistance, which is not the case in practical scenariOS. Instead, I²R losses specifically account for the actual current flowing through the resistance, resulting in real power dissipation as heat. Since transmission lines are designed to minimize current (thus reducing I²R losses) while maintaining high voltage, V²/R is not a direct measure of energy loss in operation. Therefore, I²R is the relevant metric for assessing real losses in transmission systems.