That framing is a bit of a stretch given the widespread tendency of the religious to anthropomorphize God in terms like having human-grokkable preferences and communicating them to us.
I'd say that argument has itself preemptively "retreat[ed] onto ever-shrinking intellectual turf. Defining God as something akin to the entire existence of the universe is something that essentially cannot be proved or disproved. Stick to that definition strictly, and yes there is nothing that an atheist can take logical issue with. But that strict definition also yields no conclusions/advice/insight either, so it's not very interesting. Hence seemingly no one ever being able to adopt such a definition and actually stick to it.
Any metaphysical framing of ‘why existence’ is a bit of a stretch and can never be proved or disproved. I’ve also wondered whether a logical atheist would care if they were logical considering time is zero sum :) Also, these ideas are harder to grok in the modern mindset of reductionism (also unprovable), but this conception of God and being is millenia old.
I mean the framing of an abstract non-entity God is a stretch from how basically everyone actually invokes God. Sure, that conception of God has been around a long time - however I've yet to come across any religion that sticks to that conception. Instead it's generally used as part of a Motte and Bailey setup - such an abstract conception of God cannot be disproved, and so one has to agree that such a God may exist. But then having established that, the general feeling that there is some kind of higher power is used to give weight to a whole bunch of assertions of what a completely different conception of a higher power supposedly wants us to do.
Maybe in some circles, but the abstract idea of God being love (assuming one has faith that consciousness and free will exists in reality) go back millennia. The abstractions predate the Simpson’s ‘beard in the sky’ by a few years ;)
I'd say that argument has itself preemptively "retreat[ed] onto ever-shrinking intellectual turf. Defining God as something akin to the entire existence of the universe is something that essentially cannot be proved or disproved. Stick to that definition strictly, and yes there is nothing that an atheist can take logical issue with. But that strict definition also yields no conclusions/advice/insight either, so it's not very interesting. Hence seemingly no one ever being able to adopt such a definition and actually stick to it.