No trick. Other people dont think that is the natural implication.

They seem to be correct because Israel has not nuked Iran in responses.

It's theater for the Iranian regime. They expect almost all of the missiles will get taken down by the iron dome and US interdiction, but they still need to launch them to save face at home and not let attacks go unrequited lest they look weak.

Iran doesn't actually want to hit Israel hard, or at least doesn't want to do it right now. If they did, they wouldn't rattle their sabers so hard before each giant volley toward Israel, giving the Israelis ample time to prepare for a strike.