The sanctions are hurting Iran badly and they are lashing out and pushing the envelope in frustration. Yet they know if they actually attack an American ship on station or one escorting tankers, many of the mullahs and their followers will achieve their most fervent wish. They will achieve martyrdom. Also their entire nuclear infrastructure will be destroyed within an hour of an attack on American ships.
The next thing Iranians need to hear is a lot of bubbles as their boats sink to the ocean floor. Then we can talk about what you suggested if they still need convincing.