We should either "trade" our "expensive light crude" directly for gasoline and diesel; or ban the export of finished product.
The US already produces more refined product than we use ourselves. It isn't all gasoline, some of it is refinery "leftovers" like residual oil or petroleum coke. But if we force additional imports of refined products, or we ban exports of refined products, while we are already producing more than we use, it will shut down US refineries. Those non-US purchasers will need to find someone else to supply the products they have been purchasing from us. It will shut down US jobs and send jobs to other countries.
Your solution for lower fuel prices?