Not only that, they know that the real enemy of big Labs is not china is "home gpu/tpu" improvements. Without government intervention in a couple of years everyone could have their own fable like model at home. But of course big labs and government will not allow it never
Don’t buy the “knowledge disappears because nobody needs it” premise.
We still have people learning Latin, blacksmithing and ham radio. Humans preserve useless knowledge obsessively, often because it is useless. As geohot put it, there will always be some guy digging the hole himself.