The spell literally says "you summon a creature to fight for you" (as do all of the other summoning spells).
If you are saying that it seems like an arbitrary restriction that the creature you summon will fight for you but that you cannot summon a creature because it has better senses, you want it to scout for you, trigger a trap, or any other reason, then we are in agreement.
However, from your comment, it seems that you are saying that because "you summon a creature to fight" seems like an arbitrary restriction, we should consider that it wasn't the developers' intention to impose that restriction.