Not sure how serious your question is- but there is a possibility that if universes do start when a black hole is created in another universe, followed by Guth-style inflation, then it may actually be rather easy to create universes, given something a few orders of magnitude more powerful than the LHC to manufacture quantum black holes.
The word would then probably be the local equivalent of "On!"
That may indeed be, but as you pretty much lay it out yourself, I don't think many theists want to take that route.
For a start, as you say, that would put an event horizon between us and the creator. Then not only said creator wouldn't possibly know that you even exist inside that black hole, but even when you die, there's no information from or about you that can go OUT the event horizon to the creator.
Not to mention, that being able to make a black hole wouldn't mean he can also make a non-corporeal universe for you to live in forever. In fact, in any case, he'd be thoroughly unable to suspend the normal laws of physics for you, either before or after you die. Just because he can somehow dump a bunch of energy in one place doesn't mean he can also suspend the laws of physics every time you pray really nice, or indeed at all, ever.
Plus that brings us back to those questions of mine about whether a creator would actually
care about you. I'm pretty sure that if the guys at the LHC sometime create a super-giant black hole, they'd have at most a theoretical interest in whether life can exist inside it, if the singularity in the middle goes unstable. They wouldn't feel deeply hurt that humanoid Xnorg in their black hole wanks in the shower, nor intervene if one humanoid girl in their black hole there is about to get raped. Again, they wouldn't even know it.
Even allowing for some kind of wormhole isn't really doing much, because that still wouldn't mean they have a view into every bedroom and dark alley and cave where someone got trapped by a cave-in. They'd have some viewport somewhere on the grand scale universe there, but that's about it.
What you'd get there is a deity which is the polar opposite of omnipotent, omnipresent, omniscient and omnibenevolent. You'd have a creator with zero power, knowledge or even the faintest intent to hold your hand and see to it that everything turns right for you.
Would many people want a god like that? I seriously doubt it.