***Not at all, his words will all be fulfilled, even if we don’t have a perfect record of all his words.***
Will all be fulfilled, or WERE fulfilled.
If his words DID NOT PASS AWAY then there was no apostacy.
If his words did pass away till Joesph Smith recovered them then JESUS LIED!
You can’t have it both ways.
You are interpreting the phrase ‘pass away’ to mean that we have a compete and accurate record of what he said, but Christ ministered for 3 years and the amount of actual text from his mouth in the NT could be read in an afternoon. The forty days after he rose from the dead record only a few sentences of what Christ said in that time.
We clearly do not have a transcript of everything Christ said as he ministered, in fact the gospels tell us plainly that they only record a small fraction of his words. So, by your interpretation a great deal of his word has already passed away.
I reject your interpretation of that phrase though. I draw a difference between his words (what came out of his mouth) and the record we have of his words (what made it to paper and survived to this day) I take the meaning of ‘not pass away’ to mean none of his words will fail to come to pass, everything that he said will happen, will happen, even if we don’t have a record today today of his saying it will happen. So, by my interpretation, none of his words have or will pass away.