There's reasons why the Bible does not teach Unitarianism in one whole paragraph in a few different places or a whole chapter or two on it. There's reasons why the Bible teaches that God would come to the earth as a man. There's reasons why there was never a debate about Unitarianism in Scripture like we see with justification by works or who should be circumcised. Such an important subject matter like Unitarianism and the Bible is silent on all of it.
And there's the spinning and twisting from the Unitarians who can't come up with one verse in the Bible that says we should not believe or confess that Jesus is God. Unitarians who can't come up with one verse that says why God would not come to the earth as a man. Unitarians who have to make up their own words that are not in the Bible. Words like Unitarian, and Unitarianism and nonTrinitarian.
If any of this nonsense - Unitarianism - was true and since it's so important and a huge subject to Christianity and is necessary for salvation like many teach. Then it would have been taught by someone somewhere. And it is not.