I sense that you are becoming agitated. That is not my intent. We are not arguing. We are discussing.
If they were manufacturing, there would foundries in those plants pouring hot metal. I do not believe that is the case. But I could be wrong. I don't know. I willing to accept your points.
Maybe the issue is that you and I have a different idea of what the term 'manufacturing' means. But that's Ok.
I stand corrected.
Manufacturing is taking raw materials into finished products, typically in factories. I use the same definition the world uses in counting manufacturing statistics. There are nearly always multiple steps from the raw material "mined" or harvested to the product intended for the end user. Each one of those steps is manufacturing. Regardless if it is accomplished by one company or a dozen.
If you only want to count the first step as manufacturing, taking a raw material into a part of the finished product, you are unique in your definition.