Why not deism?

[GrandizerII]

I liken the argument to someone trying to prove an unprovable mathematical conjecture by arguing it's true because it's possibly true and if possible true, necessarily true.

It's a very bad way of proving in other words.

What is it proving, exactly? What does "God exists" even mean, really (devoid of faith)? That seems like saying, "existence exists." If "God" is simply the absolute ontological ground of all logically possible existence. In that case, that might be the only thing we can really know.

"God exists" in this context means a maximally great being exists, one that is omnipotent, omniscient, morally perfect, and necessarily so in all possible worlds. God is not simply the ground of all existence here.

https://www.iep.utm.edu/ont-arg/

Visit the link above and scroll down to the bit about Platinga and his MOA.