Well that's just common sense for the team. It's not like the whole grid do it, if they can still beat the car ahead of them that's not part of their team then sure they go for it. Is this the first F1 race you've ever watched or do you just miss the point completely?
IMO F1 isn't for the dumb race fan who just wants to watch cars crash. Part of what makes F1 what it is, is the team dynamic, the strategical dynamic and to a large extent the controversy stuff like this creates. If you want to watch cars race the wheels of each other regardless of who they are racing, rather than get the best result for themselves and the team then watch Touring cars or something