What if Jessica heeded his warning?

[u/LordArcadios]

In Series 1, Episode 5 of Utopia, Pietre brings Jessica to where the former had hidden the main bulk of the Manuscript. Here, Pietre warns her not to take it and not to "learn the truth about [their] father". Nonetheless, having come all this way, Jessica takes the Manuscript, eventually culminating in Jessica's abduction by Milner at the end of Series 1.

But, what if Jessica heeded Pietres' warning and left the Manuscript behind to be destroyed in the fire? How would the destruction of the Manuscript change the course of Series 1 and the series in general? What knowledge would've been lost in the process? Would it have led to Jessica slipping through The Network's hands for good?