China has the population and the resources(ex, rare earths) to build its own complete supply chain of raw rare earths to 5nm or below semiconductors to the GPUs because its government is trying to invest in it via subsidies, non-tariff barriers, regular specific tariffs, and forced company partnerships. Whether or not we give them 90 series graphics cards and above is a non-factor. If we don't give it to them, they speed up their research and development via more subsidies. If we don't, they win too, because their AI research will speed up, where they have more papers, and even if 1/10 of those papers are credible, they will still have more.
The only way the US gets out of this is to have some sort of two-tier system for its education. One tier for associates, trades, and non-college-skilled blue-collar work, and the other for college degrees from bachelors to post-docs. I don't know how this will work with regards to the ages, telling an 18-year-old to pick may be too early, but by the time they're 21, when their brain is developed, it may be too late due to the fact that their schooling systems would already have kids in college...