Because, though they have decried and ridiculed the concept of "the great lie", turning it into another Trumpist conspiracy theory, they probably feel this "conspiracy theory" might not be one.
That is, considering they (the Media) have pushed for years false narratives and real conspiracy theories, and have been called out on it.
So maybe they are fearful they have pushed yet another one.
The audits probably won't have the expected results (overturning the election in favor of Trump), but they are helping making the whole process more transparent. And they probably don't want the people to loose their last shred of confidence in them (the Media and Democrats).
The Media lied to us? The Dems lied to us? They both manipulated us for their own profit? Trump was right?
Yeah, that would suck.
Will that happen though? I would expect much about it...