USD value doesn’t really matter. The U.S. is obscenely wealthy in many ways that go beyond just the value of our currency.
The world operates on a global market especially for commodities like crude oil, fertilizer, natural gas, iron ore etc. Even if it is produced domestically, the base price is set based on the world's supply and demand. If the USD falls in value, many resources are inputs to the economy. Fertilizer affects agriculture for instance.
Because the US needs to purchase resources on the global market as inputs to its economy. The purchasing power of its dollar maintains the prices that it can acquire those resources.