Iran has recently demonstrated the ability to execute accurate strikes in Jordan. If it can do so in Jordan, it can do so in Israel once Israeli air defences are similarly degraded. Doubly so because many missiles meant for Israel were intercepted by Jordan.

Iran knows Israel won't stop itself from attacking for too long. So they are going to wait until that point and they are likely going to try the same targeting methodology to paralyze Israeli airbases. If they manage to do so, they will be able to significantly reduce the US/Israeli strike tempo and to be more successful using drones, not even missiles.