Because Paul was an educated pharisee who understood Hebrew. The common folk did not, so there would have been no reason to write gospel accounts in Hebrew. Matthew may have recorded some things in Aramaic that were later included in his gospel, but there is no evidence that the gospel of Matthew was originally done in Hebrew. Just speculation.
You're the one speculating...
"so there would have been no reason to write gospel accounts in Hebrew"
There was every reason to write the NT in Hebrew...The first converts to Christianity were Jews...that's reason enough.
IF the NT was written in Greek originally...how do you explain such a
Greeked up mess as:
Mathew 23:1-3
Then Jesus said to the crowds and to his disciples, “The scribes and the Pharisees sit on Moses' seat,
so do and observe whatever they tell you, but not the works they do. For they preach, but do not practice.
In the Hebrew Sephardic manuscripts this verse says "to
do whatever Moses says to do" You get a skewed wrong idea from the Greek here wouldn't you say? AND you get what Christ actually said in the Hebrew.
AND
The NT is rife in Hebraic thought idiom, poetry, chiasms ect through and through...
AND
Greek is a
Meism NT; whereas the Hebrew is
Christ centric. NT..
COMPARE AND CONTRAST
Salvation from the abstract me centric Greek NT lens is based on
your response,
your (continued) faithfulness, Belief and loyalty...the New Covenant was provided because
we are faithless...He is Faithfull.
The Hebraic NT lens has the onus on
our Kinsman Redeemer who ALONE provided Atonement for ungodly men, so they now stand Justified by the
works of Christ on the cross and
His free gift of Atonement (Justification).
If your salvation depends on you at any time, you are screwed...BUT the Good News it's Not; it hinges on the Finished work of Christ and
His righteousness imputed to us.
Greek emphasizes
my faith,
my covenantal loyalty and so that
my Salvation hinges on
my faithfulness...whereas the Hebraic view is the opposite...it emphasizes
God's Faithfulness, His Covenantal loyalty who acted on our behalf (ALONE) as
our Kinsman Redeemer.
Western Greekyness just loves having "
you" be the qualifier to receive "
your Salvation" whereas the Hebraic view has "
our Salvation"
guaranteed by the qualified Life of Messiah.
Rest in what He Alone has accomplished at the cross...Atonement for ungodly men (Justified) with the Promise of a God Who CAN NOT lie..."those HE justified He will glorify"..
.no Greeky meism qualifiers that people love so much...