On the "Delusion <-> Con Artist" continuum, I'm inclined to think she's more on the delusion end. If your intent is to defraud, you'd want to avoid a domain that's 1) scientifically accountable, and 2) subject to heavy oversight and regulation. She seems smart enough to know that.
This Vanity Fair piece provides a fair amount of character background: https://www.vanityfair.com/news/2016/09/elizabeth-holmes-the...