Q. Why did John the Baptist go to live in the desert instead of with his parents? It seems like he had not observed the commandment to take care of his parents. Was he allowed to weasel out of his Levite duties? or maybe he left the priesthood because of the Pharisees.
A. I believe he lived in the wilderness to fulfill his calling as prophesied in:
• Isa 40:3-5 A voice is calling,
“Clear the way for the LORD in the wilderness;
Make smooth in the desert a highway for our God.
“Let every valley be lifted up,
And every mountain and hill be made low;
And let the rough ground become a plain,
And the rugged terrain a broad valley;
Then the glory of the LORD will be revealed,
And all flesh will see it together;
For the mouth of the LORD has spoken.”
I think maybe you assumed too much. The word of God came to John in:
• Lk 3:1-2 Now in the fifteenth year of the reign of Tiberius Caesar, when Pontius Pilate was governor of Judea, and Herod was tetrarch of Galilee, and his brother Philip was tetrarch of the region of Ituraea and Trachonitis, and Lysanias was tetrarch of Abilene, in the high priesthood of Annas and Caiaphas, the word of God came to John, the son of Zacharias, in the wilderness.
Tiberius was the stepson of Augustus, whom he succeeded on the throne AD 14 according to Roman history. The 15th year of his reign was AD 29. Since John the Baptist was only about 6 months older than Jesus (Lk 1:26 ff), he was already a grown man at that time. His parents Zacharias and Elizabeth were not mentioned again in the NT after Luke 1. They might have already died by that time, after John had fulfilled his filial duties to care for his parents.
John did not weasel out of his duties as a priest. When God called him to be the Messiah’s herald, he obeyed, just as Samuel was raised by Eli to serve in the tabernacle, but responded to God’s call to become both a judge and a prophet. There is no evidence that John left the priesthood because of the Pharisees.