It had to be that way in order for the WORD to fulfill all the requirements of the law
The testimony of two or three were needed to affirm a TRUTH
Though THE SON of GOD who came forth from
GOD and into the world who declared HIMSELF the BREAD which came down from Heaven could testify of HIMSELF HE understood according to the law two st least weee needed which is why HE pointed to John as a human witness that a man might believe
But THE SON pointed to HIS FATHER and those who had the WORD and law were confused and offended and asked again and again "who is your FATHER?" (John 8)
Showing that they did not believe HIS TESTIMONY
And in fact John's TESTIMONY was weightier than what you have mentioned
John knew this was the ONE who is from above who speaks of what HE has seen though no man believes HIS TESTIMONY (John 3:30 and John 3:31)
You are right, it had to be that way in order for the Word to fulfill all the requirements of the law.
The testimony of 2 or 3 were needed to confirm a truth.
So if you read John 8:16 you will find out who the 2 men were who testified of the truthfulness that Jesus was the Son of God.
John 8:16-18King James Version (KJV)
16 And yet if I judge, my judgment is true: for I am not alone, but I and the Father that sent me.
17 It is also written in your law, that the testimony of
two men is true.
18 I am one that bear witness of myself, and the Father that sent me beareth witness of me.
So Jesus says you need 2 men to establish the truth. Jesus goes on to say that he is
1 man and he bears witness of himself, and the Father is the
second man that
sent me and bearth witness of me.
Notice that Jesus uses the term 'men', there is a need of '2 men' to establish truth.
Jesus is referring to himself as a man, and he also refers to his Father as a man. Interesting don't you think.
Now it makes sense. Jesus, 1 God/Man, was sent to earth by a second, separate and distinct God/Man. It only makes sense now, God truely did send His Son. Jesus left his Father in heaven and came to earth, but the 2 of them testify that Jesus is the Christ and it establishes the truth of it. Perfect.