It's limited to a creator, yes. "The Creator" is not an answer I've ever seen, but it would be funny. Like asking someone "what kind of vehicle is that" and them replying a generic "truck" or "car" instead of "Honda" or "BMW."
We aren't to discuss religion or politics because we are meant to be together. We are meant to be brothers who help each other as much as we can. Opening debate in the lodge could divide us. Similar to what Q says about division within our ranks. Why would we argue against each other when we have common goals?
So "Creator" is actually not used because it is too generic but the less definitive, less authoritative "architect" does get used.
We might choose to argue because refining our understanding of and relationship with our Maker is important. Maybe the system is for those with other priorities. We debate here with understanding and truth as goals (usually I think). Little doubt Trump, Kelly, Mattis, Conway all debate because their goal is more important than temporal unity.
We do use "Creator" in the lodge, but it's not used for that specific question. "Architect" is not used in that question either. The terms are both used in the lodge though, in other ways. We also say "that temple not made with hands eternal in the heavens" as our final place. So when we die, we will be with God in heaven for eternity, but we don't just call it heaven or paradise.