The shepherds came and drove them away, but Moses stood up and saved them, and watered their flock.
Exodus 2:17

Like the shepherds who kept Jethro's daughters from their well and the stone that kept Rachel's flock from hers, false teachers keep God's people from receiving His Spirit and Word. Like Moses, Messiah #yeshua came to drive them away.

Why did Yitro allow his daughters to go into the field without protection? He probably didn't. Their guards are probably omitted from the story in order to highlight the prophetic and spiritual symbolism.