Yahweh, a question for Jw's?

Why do you use the name Jehovah? God never revealed himself as Jehovah, He reveals himself as Yahweh. Yahweh is translated in most bibles as LORD all caps and is used 6828 times in the OT. I understand that in the original Hebrew in its ancient form they didnt have vowels and so in was translated YHWH. Like my name is Daniel it would have been translated DNL. . So words were being pronouced wrong and along come the Masoretes who began adding vowel points at the bottom underneath the constanants so people would know how to pronouce the words. Well they were so hung up about saying Gods name that they put the vowel points for the word Adonai translated "Lord" under Yahweh. So when they translated the OT of the KJV they made up a word. Jehovah. It comes from the hybrid of the constanants for Yahweh with the vowels from Adonai. I guess with all that being said, why do you edit your NWT bibles with a made up word. And why is it wrong for you to use the name God choose to reveal to us?