Problem is, Trinitarians don't know what the Trinity is. The statement was made, "Jesus is Jehovah." Not according to purist Trinitarians I have spoken to. They insist that the Father is not the Son.
Those who want to believe in the Trinity will do so. Die-hard Arians like myself will opt for strict Monotheism: One God, with everyone and everything else subordinated.
All the argumentation in the world is not likely to change anyone's mind, so why bother? The Bible, depending on interpretation, can be made to support either side.