- Adults are not super humans and can make mistakes
- and 17 year olds are as capable as adults.
In engineering people frequently ask - why nobody thought about it - well because nobody did.
Edit: was that person the only applicant? If not why did the process identify them as the most suitable candidate?
That really shouldn't be taken as a given.
"Never attribute to malice what can be adequately explained by incompetence." Or by laziness, overwork, miscommunication, etc.
Because hiring is entirely broken in many industries.
He describes a very poor practice that they still failed to follow.
So if this decision was made by the Board without staff assistance, I can see them being swayed heavily by a female candidate who had international experience. It's the ol' out-of-town expert bias.
The hiring committee probably had deadlines for researching the candidates and making final decisions, whereas the students didn't have the same sort of time constraints. (I don't mean to minimize the achievement of the students! But you asked for factors that could have allowed the adults to miss this one.)
The woman was probably fairly charismatic to pull this off. The hiring committee surely had several face-to-face meetings with her and was swayed by her charm. The students would have seen her 'fake principal' self rather than her 'job interview' self. They didn't get the full snow job, so they were perhaps freer to think more objectively.
Also, I'm sure there's a false sense of safety in numbers for the hiring committee: if one person (or every person) had vague doubts, they might think, "Oh well, everyone else seems to think she's okay."