And I'm saying that what people want aren't necessary important even to those people. What people want is being manipulated all the time and even without outside pressures changes over time.
The iPhone 5(s) for instance switched to a light all-metal body. This was what people wanted after all, metal and lightness. Turns out that it's much more easily scuffed and dented and you absolutely have to use a case with the iPhone 5(s) unless you're super careful (like me).
The removable battery is like that. Even ignoring the fact that the HTC One (China version) proved that you can have a metal phone with a removable battery, it's actually a desirable feature that people don't realize is important and thus don't "want".
For example, I know someone who has a iPhone 4S and complains that it has terrible battery life compared to Android to which I responded "huh, generally iPhones have good battery life". Turns out her usage pattern (she refuses to charge unless the phone is down to at least 25%) is really killer on the battery cycles and now her phone has really bad battery life. After watching me swap batteries on my GS4, she mentioned that it would have been nice if her 4S could do that. At the very least, it's not a detriment!