Not at all. There are indeed a lot of dropshipping companies that take advantage of the low costs offered by Chinese companies like AliExpress. However, there is no rule saying that dropshipped products must come from China, or even that they need to be imported at all.
Dropshipping simply consists of selling products while having no inventory. You cut costs by directing customer orders to manufacturers or retail stores, who then ship the goods to their destination. In theory, you can even set up a dropshipping store that sends the order to another dropshipper - however, that usually drives up costs to the point where no reasonable customer would be interested.
What that means is that while some dropshippers use AliExpress as a supplier, others use Amazon, eBay, or even deal directly with manufacturers. And the goods can be produced domestically, or come for any part of the world. There are entire dropshipping directories dedicated to helping sellers find suppliers around the world. If you want to find the best dropshipping directory for yourself, check out this review
by Know It All Nev.