This guy missed a big point. True, money can buy almost anything in a market with buyers/sellers interacting for the mutual benefits and on commercial terms. Unfortunately the US and China are adversaries now. Having barely avoided a war only two weeks ago, they are playing a zero-sum game now.
How could the US or its allies sell hi-tech to China, the enemy, at any price? You wouldn't help your archrival kill you either even they offer you a gold mine in return.