They meant the Gulf. You cross the straight into the Gulf, then what?
Iran hit an E-3's antenna in an airport in Riyadh with a precision strike. Was it not worth defending?
How many tankers inside the Gulf do they need to hit before the rest of the world decides it's a bad idea to send new tankers to the Gulf?
And if new tankers don't go into the Gulf, then it's simply not open for business. That's their leverage.