[HUGE SPOILERS] Is Maker real in Dragon Age?

I saw a comment saying that there is evidence that the Maker isn’t real in Dragon Age. Is that true, and what evidence do we have?

I'm on my Inquisition playthrough, but I want to know the truth about it since my character strongly believes in the Maker and that he was chosen by Andraste. So now I'm wondering if he could be right about it.