Advanced chip making is one of if not the most complicated and cost intensive manufacturing processes in the world. It’s not something you can just throw a team of geniuses onto and have them spit out a product in a couple of years. It’s not that China is incapable, they would just need to spend a lot of time and money investing in R&D, the same thing companies like TSMC had to do. They’re already doing that, but in the meantime the United States is trying to protect their competitive edge.