So when she's President, and something unexpected happens that, as one of the top 5 most important leaders in the world, she must understand and react to, should we expect that because she didn't know much about the topic, failure is just ok?
I think this demonstrates that she's not really fit for office, as she can't think strategically and lacks paranoia about what could go wrong/what good looks like. It's not conceptually difficult to imagine there being problems with having discussions in an unmonitored space that involve serious matters of state. It's also inconceivable that a person with such a long service record could have avoided training and briefings on the importance of such matters. The only sensible conclusion is she felt she was above the rules, and didn't care.
The worst part about this is, she's still head and shoulders better than Trump. Whar third party candidate??