Violence and chaos is the point. Neither Israel or the US have the means or motivation to actually occupy Iran with ground forces and to build a new government from scratch. Hell, look how well that worked in Iraq. The goal is instead to turn Iran into a failed state that is completely incapable of providing even the most basic services to its population. A collapsed state can’t build effective missiles or support proxy wars outside its borders. At best you can knock together a few hamas-style bottle rockets in garage workshops.

Right now the goal is to wipe out the government leaders and military assets. When that fails to result in the overthrow of the Iranian government, the US and Israel will move on to civilian infrastructure. The power grid. The water systems. Fuel production and distribution, bridges, ports, rail lines, etc.

If they can’t topple the Iranian regime, they’ll leave the Iranian regime ruling over a pile of ashes, a nation with the infrastructure level of Somalia.

You can’t install a friendly government with air power alone. You can however do enough damage to a nation’s infrastructure that it can’t even keep its own people alive, let alone have the spare resources to affect things beyond its borders.

That is the real goal of this war. To turn Iran into a failed state.