LOL! It is called supply and demand, look it up. Stop exporting and domestic supply shoots up and prices go down FACT FACT FACT.
Supply and demand is the way global prices work. This supply and demand situation is buffered across the entire world. Eliminate US exports and US prices will be disconnected from global prices. Price controlled US petroleum will, in that environment, lose profit margins and lose capital investment, leading to lower production. Which will require importing petroleum again.
There are reasons why the 1970s became the 1970s.