Uhh, we don't?
Ever seen E.T?
Its one of a number of movies where aliens aren't hostile towards us. Why don't we see these as often?
They tend to be slower paced and more thought provoking as opposed to what it is assumed people want to see these days - the latest Michael Bay flick with things dying and explosions everywhere, and in those cases its easy to put in aliens as the antagonist because for all intents and purposes they don't exist. You don't risk offending anyone by making aliens the antagonist, and can basically do what you want with them with no complaints.
Also keep in mind that in most of even these movies there's still a good faction of aliens that are on our side to fight against the evil ones, so really its only in movies like independence day and that that aliens are purely hostile. Its really not as common as you might think.
Ever seen E.T?
Its one of a number of movies where aliens aren't hostile towards us. Why don't we see these as often?
They tend to be slower paced and more thought provoking as opposed to what it is assumed people want to see these days - the latest Michael Bay flick with things dying and explosions everywhere, and in those cases its easy to put in aliens as the antagonist because for all intents and purposes they don't exist. You don't risk offending anyone by making aliens the antagonist, and can basically do what you want with them with no complaints.
Also keep in mind that in most of even these movies there's still a good faction of aliens that are on our side to fight against the evil ones, so really its only in movies like independence day and that that aliens are purely hostile. Its really not as common as you might think.