Simple reasoning.
That is the issue right there.
Carnal humanistic knowledge trying to explain an infinite God.
Knowing in part just as the scriptures say.
You think you can figure out God (The 3 in one as the God-Head) with your knowledge, limited – in part knowledge.
I hold to Scripture (all of them).

If your belief system holds true
Why is blasphemy against the Holy Spirit held to a higher standard that blasphemy against the Son?
They are both still part if the God-Head.
Isn’t it still blasphemy against God? Lying was…Acts 5:3&4.

God is triune, you just can’t separate one out and then dissect them against each other(s).
They are not in opposition to each other, they are in perfect harmony.

Did Jesus conceive Himself?
No the God-Head did (through the Spirit) yet it was still God.
Luke 1:35
And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.

God created the Heavens and the earth.
How, the Father did through the Son
John 1:1-4
In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him; and without him was not any thing made that was made. In him was life; and the life was the light of men.

You are trying to break down the whole by using it’s parts…
Have you ever tried to blow your car horn using your tire?