A theological argument can be made for the JW perspective in the following way.
Indeed, the argument you put forth is similar to what WT writes
The Skeptic might think: If God wanted everyone to know him and use his name, why would he allow such an important alteration to occur in the first place? As a result of God's inaction, his name nearly vanished for millennia; and as such now, at this critical junction in time, most still fail to use his name and understandably so, a very costly and fatal mistake, according to JW theology.
It seems to me there are a few separate but related points in this thread:
1) Did the first Christians use YHWH at all? There is some evidence that they might have, at least when reading from their own OT manuscripts.
2) Assuming they did occasionally use the name for YHWH, did they pronounce the name for Jesus more or less often?
If we were to compare the writings of those first Christians to WT publications, how would the frequency for the use of YHWH compare? Even if we were to use the NWT's version of the NT, which claims to have restored the use of the name, it's still evident to me that JWs emphasize the name YHWH much more so than did those early faithful, and I'd add it occurs in an inverse correlation to the name Jesus