Suppose you want to build something that requires technical knowledge (a GPU, a fighter jet, ...). You have engineers, but they don't yet know how to build it.

If no one on earth has ever built this thing, you need to consider the possibility that it can't be done at a cost you can pay. Perhaps it violates some law of physics, or it can't be manufactured without knowing some chemistry/physics that we are 100+ years from discovering.

If a company in some other country is already building this thing, you can be sure it is possible to build it. That is a critical piece of information! It means you don't need to discover (much) new physics. It means you can buy/steal a working copy and look at it to learn about it. It means there are engineers you can hire/spy on to understand their design process. It means you can more easily convince a bank/government to fund development, as they have proof your goals are achievable.

Inventing a thing is much harder than inventing a clone of a thing. The idea that China doesn't have the people and organization to copy things other countries make is the opposite of Chinese Exceptionalism. It is the belief that the Chinese are uniquely incapable of engineering work. This is obviously not true.

The phrase is “fait accompli”, without a D, and is French for “accomplished feat”.

The ever closing gap between the capabilities of frontier models vs chinese open weight models.