THIS is the question that those that favor lifting the embargo are NEVER able to satisfactorily answer. THIS proves up the fallacy of that argument.
Exactly. Also, why do they think lifting the embargo would take away Castro's excuses? Before Castro, U.S. companies did lots of business with Cuba and Castro said companies like United Fruit were "exploiting" them. Using Castro "logic", with the embargo in place, we're exploiting them by not exploiting them.
Another point the embargo-enders refuse to discuss is why the U.S. imposed the embargo in the first place. The embargo was put in place because Castro stole hundreds of millions of dollars worth of U.S. properties on the island. Here's a novel concept: first have the thief return the stolen property and then we consider lifting the embargo.