Keep in mind that, at scale, equipment is always breaking, whether the breaks are intentional or unintentional. The question is not whether the tower was broken by bullet holes or something else but how the equipment had been in this broken state beforehand. The task of a utility is to have a sufficient maintenance schedule to insure that most pieces of equipment unlikely to be broken even a few are. Overall, the "1,500 fires" part is what's damning, not any single fire. Again, overall, PG&E has terrible maintenance record and this is the impetus to hold them liable derives.