The article describes how her openness almost cost her the job offer. In the author's opinion, she made a mistake by being open about her insecurities in a job interview.
I've worked with people who are probably too open about their insecurities. I think you can be open about what you don't know without saying things like "I don't know if I can do this job." Frankly, I don't really know how to respond to that kind of statement in a professional setting beyond resorting to platitudes.
I think there are better ways to talk about your insecurities, like saying "I have experience with X, but I haven't worked with Y, and I know I'll need to figure Y out for this role." That seems okay to me. Knowing what you don't know is really important.
> Most successful CEOs are very open about everything, and don't keep secrets. Secrets and opacity are what destroy companies and relationships, not the reverse.
Everyone has a private interior life. Everyone feels things and thinks things that they don't voice publicly.