I disagree.
The author of John - not John by the way - could have stated very simply the Jesus was The God (Ho Theos) if that was what he intended.
The WT are wrong about almost everything but not regarding John 1:1.
The translation that captures the anarthrous predicate noun best is perhaps Moffatt who has it as "The Word was divine".
The gospels reveal an evolution of the divinity of Jesus. Practical adoration of Jesus by a monotheistic group eventually required a theological explanation. The trinity is a self-contradictory, post-biblical piece of gobbledygook.
I challenge anybody to state it in their own words - and illustrate it - without using specialist language without contradicting themselves or committing heresy.