I don't think we should conflate ubiquity with superiority, but it is easy to see how the latter often leads to the former. Perhaps Western movies are indeed considered very good, even by people from other cultures, which is why they decide to watch them. Or perhaps the cars invented last century, first developed in the West, already found some optimal designs that are simply more efficient, and therefore will be widely adopted.

Your implied explanation is rather bleak, as it seems that capitalism is independent of consumer wants or needs in this perspective.