She fully embraced the startup grindset, faked it till she made it (she didnt get there) and moved fast and broke things - emulating the heros around her.
In the end she goes to jail for being a bad investment for investors and not for the "crime" of fucking around with peoples health.
That's hard to determine and presumably why she wasn't prosecuted for it. It's certainly believable that people received false assurances about their health from Theranos that ultimately led to a preventable death.
There's 2 signs of intelligence that I've seen. First, coming up with something new and novel, e.g. being the first to decide that we can move fast & break things. The second is knowing when to apply patterns, e.g. applying the lessons learned from other startups.
Holmes showed her lack of intelligence by applying those startup patterns to a highly regulated industry. To get her product into some of those settings required committing fraud. So, the whole move fast and break things works great for startups, it fails miserably in healthcare. She didn't know better, and even worse didn't know when to apply a different pattern.
In the end she goes to jail for being a bad investment for investors and not for the "crime" of fucking around with peoples health.