Trump explicitly stated that was his aim, for the people to rise up after Trump did a little long distance assassination. The plan is far more stupid than subduing Iran by invasion.
"At 2:30 a.m. EST on 28 February, Donald Trump released an eight-minute video statement on Truth Social, saying that the purpose of the US strikes in Iran was effectively[vague] regime change."
Not saying this is a smart plan, but how is it far more stupid than invading Iran which is basically impossible unless you are ready for tens or hundred of thousands of casualties among your own citizens?