Both Kora and Vietnam involved American ground forces, which is a significant factor in public war weariness. In the case of the blockade of Iran, aside from gas prices being too high, it's all rather abstract to the everyday American. Some ships somewhere are stopping other ships from floating in the wrong direction, the news said we bombed some thing and Iran bombed some other thing. We've been reading about bombings for more than 20 years - it's just routine now.

You're again right, the commitment of the elites in power in Iran matter. BUT if things get bad enough their hand will be forced. And if not, oh well, we can just maintain a blockade. Either way countries in the gulf region will move away from utilizing the Strait due to war uncertainty.