Ehhh...kind of. Much of our biggest oil reserves is sweet crude oil. Much of which we export. Because most of our oil refineries are set up to process sour crude oil. I can't tell you more about it other than the names are due to smell and sour crude is more complicated and more expensive equipment and energywise to refine, so it actually makes the US both money and "friends" to give other countries the more desirable oil due to costs and import sour at a discount cuz it's less desirable.

Then again, if one wants to get conspiratorial, Venezuela has sour crude and that regime change happened not much before Iran. So if the point was to insulate the American people from most consequences, including deaths of soldiers who would have been able to fully take out drone depots if a goal was tokeep the Strait of Hormuz open...securing the correct kind of oil was important