Sorry you got triggered. I know it can be an emotional topic for some people. I'll try to explain in a simple way.
We clearly are replicating at least some significant aspects of human intelligence via LLMs, despite biological complexity. So we obviously don't need a 100% complete understanding of the corresponding biology to build things which achieve similar goals.
In other words, we can (conceivably) figure out how intelligence works and how to produce it independently of figuring out exactly how the human brain produces intelligence, just like we learned the laws of aerodynamics well enough to build airplanes independently of understanding everything about the biology of birds.
Whether we will achieve this or not to the point of AGI is a separate engineering question. I'm only pointing out how flawed these lines of argument are.
> We clearly are replicating at least some significant aspects of human intelligence via LLMs
That's a very load-bearing "clearly". I don't think it's clear at all lol.
Again, you are vastly underestimating the scale here.
Heavier-than-air flight is (relatively) straightforward and it's easy for humans to build models. Also, you know when you're flying.
Building a star is theoretically also relatively straightforward -- just collect a lot of gas and dust in one area and wait for gravity to do its thing.
Actually doing that is left as an exercise to the reader.
> That's a very load-bearing "clearly". I don't think it's clear at all lol.
Are you really disputing that LLMs can replicate some aspects of human intelligence? I mean, they're often passing the Turing test, writing non-trivial programs, and got a gold medal in the IMO.
Maybe you aren't well informed on their actual capabilities?
> Heavier-than-air flight is (relatively) straightforward and it's easy for humans to build models.
Actually, before the first airplanes were created, plenty of people were making arguments very similar to yours to dismiss human flight as impossible.
"Heavier-than-air flying machines are impossible." - Lord Kelvin, 1895
As are birds, yet we can still build airplanes.