> Now imagine some very advanced quantum computer (or something 10 generations after it) that can scale infinitely...

Yeah, um... about that assumption...

This solves the "too much detail" problem by assuming that they have magic hardware. That's absolutely not realistic in any way.

I mean, this whole thing feels like a substitute for God for those who don't believe in God. It's Someone who existed before the universe, and created the whole universe out of "nothing" (nothing pre-existing in this universe, anyway). Now you're giving Him infinite resources (or miraculous ones that can scale to infinity, which amounts to the same thing).