Probably people are betting that the situation resolves itself before shit hits the fan.

And there is a bunch of plausible reasons that this belief is not crazy (of course nobody really knows).

- trump literally is called TACO

- the war is really unpopular in usa and midterms are getting closer. There is domestic usa pressure to wrap this up.

- Iran's ecconomy was a mess before all this and is now a disaster. The blockade goes both ways and it seems unlikely iran can keep it up long term

- As shortages approach international pressure from uninvolved parties to resolve the situation one way or another will mount.