I do get that. While I understand that some people firmly believe in a literal creator, in my case it's an anthropomorphisation of all that is unknowable and truly fundamental to the existence of our universe, just as the green woman with the spiky hat is an anthropomorphisation of liberty. The difference being that I stay open to the idea that the creator might be conscious because I have no way of disproving it, where I'd put put hundred dollars down that the green lady is a big chunk of metal with a slap of copper and asbestos over the top.
I don't know if other universes with different maths are possible. Greg Egan's books take my to the limit of my conceptual capacity, but I do think there are limits to what it is possible to know from within this universe, because everything needs to be built up from axioms from this universe. I agree with your explanation, right now while I'm sitting here in this universe, but if the celestial teapot turns up this afternoon and takes us both to perpetual motion machine universe, we might start to see things differently