Read and enjoy.
Garikapati garu says, when we question the first part itself, story doesn't';t hold any basis because King's sons went to hunt and came back with fish? He says, 7 fish are our vices (pride, avarice, Envy, wrath, lust, gluttony, and sloth). He said, the one which didn't dry is our Kama (direct meaning is lust, but he elaborated it to include all our desires). To get rid of it, we need Knowledge and haystack is the obstruction, which is our ignorance. To get rid of ignorance, we need knowledge, which we can get either by burning the haystack or remove it one at a time. Just like cow eating one straw at a time, each of our exposure to knowledge, we are removing one straw at a time. So to get this knowledge, we need a GURU (teacher). Teacher didn't give us this spiritual knowledge because mother of education (Saraswathi, Goddess of education) didn't tell him/her to give that to us. Mother of education went to take care of the child who is wailing to see her (he gave example of Ramakrishna, Indian spiritual saint). Ramakrishna was wailing for her darshan, and he was not looking to experience this Maya (iillusion- Ant) which tries to put this Material world on the person who puts their finger into it (Ant hill).
He also mentioned that just like Vivekananda, who was asking every saint about God and whether they can show him God. So someone refers him to go and visit RRamakrishna There were thousands of people waiting to see Ramakrishna. Vivekananda was waiting outside the Mandir/Temple. But Ramakrishna, who was inside sent his people to fetch Vivekananda to show him God. This is the example of Mother Goddess telling GURU to give knowledge to her child.