Hi Slim,
I believe that the New Testament is reliable. Conspiracy theories are interesting but unproven.
The NWT inserts the divine name 232 times in the NT. Over half those inserts are not based on quotations from the OT but obvious leadership bias.
So even still, Jesus name is emphasized more (300+ vs 232) than the name Jehovah.
And again, scripturally speaking, there is no access to the Father without the Son. One cannot be saved, one cannot receive the Holy Spirit, one cannot see the kingdom of God without believing in the only Begotten of the Father.