It depends I suppose on what Lucy Letby had seen on the unit. I have read that she was meticulous about Datix reports when things needed logging. To play devils advocate, I wonder if the handover notes were insurance if things did crop up later. In terms of nurse versus mostly male consultants and hospital management you'd need solid evidence of negligence / malpractice to whistleblow. The other way around, not so much it seems.
If you think about it, we have 7 consultants in total, with 3 being the ringleaders, and allegedly gossiping about their concerns. Nothing the other way round, and it is reported she was somewhat officially isolated from her peers.
However, we can only theorise. The argument could be made that she could have used this as some sort of defence, but the court system is a cut throat environment. Legal advice would be to keep things simple, as such "arrogance" from a young nurse would place her in an unfavourable light. She even had to concede there were insulin poisonings, although said she didn't do it.
Perhaps the consultants were genuine in their beliefs and concerns, perhaps things snowballed, perhaps they convinced themselves that they were being genuinely heroic. However, their subsequent steps into the limelight never sat well with me given the gravity of the case. And if they had enough genuine concerns after a third death, you'd think they'd move heaven and earth to protect further babies in their care, and hang the system.
Thing is, people under pressure can behave in extraordinary ways to protect themselves, even if previously squeaky clean, it just depends on the trigger.
None of the medical evidence really stands up, and the circumstantial is flimsy at best, even taken together.
It is one of the most complex, emotive and frightening cases overall in recent years. And the poor parents deserved so much better than the 3 ring circus certain "experts" engaged in. They must be going through hell. And if, as is looking more likely than not, Lucy Letby is innocent, this is a tragedy all round of unimaginable proportions.