There's a lot of work involved in how the data is annotated and how the labelers are managed. You have to minimize the error of the labels, because they aren't perfect and the tasks can be more difficult than you might realize.

Secondly, using the data is also difficult.

You have to decide what data you need, how you are going to get clean data, and how you are going to use the data. That's the competitive advantage.

US can always outsourced the work to other countries, and then start some trade war to get back what they lost but didn't notice initially. :)

Say you can do it, out source it to China, mark it up 20%, the aristocats!