Nothing pedantic about it. We live in an era where people ought to understand the difference between power (measured in watts) and energy (measured in joules, or calories, or watt-hours).

But for some reason this is widely misunderstood, resulting in frequent errors and poor decision making. The Times, a generally-reputable UK newspaper, once published a front page headline declaring that electric vehicles would require the equivalent of 20 new nuclear plants to be built in the UK. None of their fact checkers noticed that the entire article was based on an error that confused GWh (energy) with GW (power).