Right, yet, Chrome has an enormous number of Mac users. Apple argue that battery life is a topic so important it's worth banning competitors for but clearly when given the choice users disagree. There are other things more important to them.
>>native+(OP)
My impression is that most computer users have a limited sense of which software applications are churning through battery, and instead just blame the computer vendor.
That is, if Chrome churns through battery on a Mac laptop, the typical user is going to just think “Apple laptops have poor battery life”, never realizing that switching to Safari would make a significant difference.