America could manufacture footballs for under $20 but choose not to do it since they can hedge prices a little more by outsourcing.
Back when Sam Walton was still alive and still working the campaign to “find American quality products” for Walmart one could buy cowboy bandanas that were made in the USA for 99 cents. After Sam died one could buy inferior bandanas made in China for 99 cents. I still have some of the early American made ones that still show more quality than the Chinese ones.
I seriously doubt that “America” could manufacture, market, distribute, and sell an NFL-quality football at a retail price of less than $20 and make a reasonable profit. The NFL logo and the commissioner's signature on the Wilson NFL ball surely adds builds a premium into the current price, ... but $70?