Say maybe the New Testament was handed down from father to son, but knock and ridicule those that did. Parker Brothers issued a game during the great depression called Monolopy. The game has been very sucessful. Millions of people have played it. When they issued this game it came with instructions for playing the game.
Many players follow the exact instructions.
If they come across a situation not explained in the instructions they contact Parker Brothers who give them a ruling. On the other hand some players modify the instructions and play according to their own rules. That is fine in Monolopy but not in real life. It was the Jewish nation at Har Sinai, through Moshe Rabbinu, that received the Torah and its interpetation directly from Hashem. It was Jewish Prophets, Jewish Judges and Jewish elders who record and interpet the sacred pages of Tenach.