Hashem is not your secretary or your banker. Again the Mashal of a child asking from his father comes to mind. If he says, give me this and that the father is less likely to give it. When he speaks with his father about how he needs something and why it is beneficial that he has it, the father will very likely relent. Besides for the fact that he explained his need and his father agrees, there is another issue. The fact that it was discussed makes this give and take a relationship. This deserves a response.
We can also learn from the story of the man in the dessert that Hashem wants to answer every Tefilla. When the person is not deserving and He can get away with answering the literal words, Hashem will rather do that than ignore it.
And, to say that you Daven just for the exercise of speaking to Hashem and you aren’t expecting change, is to not believe in Tefilla. For some reason every discussion of Tefilla turns into something about ‘no’ also being an answer. While it is nice and important to realize that we can’t twist Hashem’s arm, that is not the core of Tefilla. Hashem does listen, He does answer, He is ??? ??? ?????, and He answers Tefillos in the real sense of the word.