Why don't you get it?
As long as there is China in East Asia, the US will not dare to put ground troops into Iran. As long as the U.S. does not commit ground troops, it is impossible to overthrow the Iranian government by bombing alone.
Only after making the Iranian government feel the pain will they reflect on it and make rational choices later.
If we help the Iranian government now, the Iranians will not thank us, they will thank Allah, they will think that it is Allah who uses divine magic to make the Chinese save them, and that the Chinese are only worthy of being tools to be used by the Iranians.
They will continue to be friends with the Indians, sell China's interests to the Indians, and continue to fantasize about reconciliation with the Americans through India.