1) John never did time at the tabernacle or temple.
Moreover those who were to camp before the tabernacle on the east,
before the tabernacle of meeting, were Moses, Aaron, and his sons,
keeping charge of the sanctuary, to meet the needs of the children of
Israel; but the outsider who came near was to be put to death.
Numbers 3:38.
So the child grew and became strong in spirit, and was in the
deserts till the day of him manifestations to Israel. Luke 1:80.
2) John never drank wine or cut his hair during his Nazirite
vow.
All the days of his separation he shall eat nothing that is
produced by the grapevine, from seed to skin. All the days of the vow
of his separation no razor shall come upon his head; until the days
are fulfilled for which he separated himself to the LORD, he shall be
holy. Then he shall let the locks of the hair of his head grow.
Numbers 6:4-5.
For he will be great in the sight of the Lord, and shall drink
neither wine nor strong drink. He will also be filled with the Holy
Spirit, even from his mother's womb. Luke 1:15.
3) John did not wear temple garments or eat temple
sacrifices.
For Aaron's sons you shall make tunics, and you shall make sashes
for them. And you shall make hats for them, for glory and beauty.
Exodus 28:39.
Then Aaron and his sons shall eat the flesh of the ram, and the
bread that is in the basket, by the door of the tabernacle of
meeting. Exodus 29:32.
Now John was clothed with camel's hair and with a leather belt
around his waist, and he ate locusts and wild honey. Mark 1:6.
4) John was a Prophet not a Priest.
For all the prophets and the law prophesied until John. Matthew
11:13.
5) John testified of Jesus Christ not a priesthood.
The voice of one crying in the wilderness: Prepare the way of the
LORD; make straight in the desert a highway for our God. Isaiah 40:3.
There was a man sent from God, whose name was John. This man came
for a witness, to bear witness of the Light, that all through him
might believe. He was not that Light, but was sent to bear witness of
that Light. John 1:6-8.
John answered them, saying, "I baptize with water, but there
stands One among you whom you do not know. It is He who, coming after
me, is preferred before me, whose sandal strap I am not worthy to
loose." John 1:26-27.