Then Adonai said to Moses, “Stretch out your hand over the land of Egypt for the locusts, so they may come up onto Egypt and eat every plant in the land—everything the hail has left.”
Exodus 10:12 TLV

God could have sent locusts without Moses stretching out his hand, but he prefers to work through his prophets and apostles. We were created to be God’s hands in the created world.