yeah it is. winng is better then getting kills.
you don't realize that every kill is a win, do you?
a kill in the game means there was at least two actual people were involved, and one of them lost.
a base switching hands only means an object on a terrain died (map room). no player has to get killed. If there is no player to be killed, why not just take bases offline and fight against your computer?
don't get me wrong, base taking gives people something to do, stirs things up usually, its great! but don't think for a minute that taking bases and resetting maps is the only objective in the game.