You'll notice that he also takes the Aristotle/Spinoza dodge.Aristotle believed that the world always existed and the Unmoved Mover (i.e. God) always existed and that the UM did nothing much other than organize the preexisting world.
Spinoza believed that the world always existed and that the world and everything in it was God (thoroughgoing pantheism), eliminating Aristotle's distinction.
Both of these theologies dodge the obvious question: where does the world come from if God was not its author?
Your last question seems to ignore the points you made earlier about the world having always existed. If the world (i.e., physical being of some sort) has always existed, the question, 'Where does the world come from?', is already answered.
The existence of a world that has no internal principle or constituent power that explains its own existence is problematic.
Good point. If it has always existed, then it was never created, and there is no creator.