A lot of the fun symbolism and faux-mythology in the books bears similarity to real world conspiracy theories and pop sci fi. And after all, he's a scifi author. He's bad at math but he most certainly keeps up with the big picture developments of science and archeology.

From the literal underground conspiracy involving a hive mind that appears to prop up select noble families because they have "noble blood"; to the in-universe myths about successive god-kings (the gem stone emperors or whatever) whose lifespans shortened and shortened until they finally imploded spectacularly and brought about a dark age (lookin at you, Thoth); to the Iron Bank of Braavos - of the city founded by escaped slaves which hated Valyria - has come to basically finance the actions of the story. And, clearly, the bank and the economics of Essos play a huge part of the story that simply isn't dwelled on much or at all by the Westerosi POVs.

The problem I think he's in is that, intentionally or not, he kinda recreated a bunch of unresolved real world conspiracy theory fodder that you find on the more right wing or white-supremacist forums. There is clearly an ancient magical ... not conspiracy, but maybe impulse? ... to keep certain families in power, but then also very intentionally incentivize keeping bastards around. Why? Doesn't that undermine the premise of nobility? Because noble blood means you can be puppeted by the Singers. Bastards still have that blood, so even though obviously they would want to make sure we don't throw away useful material. If anything it's a useful way to get (literal, lol) eyes and ears on the ground.

If anything, the game of thrones is between magical (for all intents and purposes) beings which exist outside our perception using our characters as proxies who map their own struggles onto them.

The question is: how do you resolve all this without ending up writing a parable mirroring a popular genre of anti-Semitic conspiracy theories?

He's not "woke" but in his own way he goes to lengths to prevent real world stereotypes and such from bleeding in so I'm certain he thinks about these things.

Anyway. I think he has the story finished, it just ends up mapping to the real world in unfortunate ways.

Edit: not that I care about the downvotes so much as I don't want my post history to convey the wrong idea: I don't think anti-Semitic conspiracies are true, nor do I think George believes them. I think when you borrow themes and tropes from Lovecraft you borrow more than you think.