Well, people also complain (extremely loudly) that they paid for a 50Whr battery, and by golly, they mean to get 50Whr of power out of it! They're not going to let some slick talking corporate drone trick them into believing they should only use half of what they paid for.

Practically speaking, even assuming my battery did idle at 50% sitting on my desk, what happens when I decide to take it out to the coffee shop (or the airport!) and want it at 100%? I don't want to micromanage charging my battery and filling it up before I go out. I have enough fun discovering my car is only ever out of gas when I'm about to depart on a long drive.