This is true - obvious, even - in principle. The reality is she's in an environment where it's not really possible. Too easily thrown back in her face, henceforth every story would begin, "Carly Fiorina, who by her own admission single handedly ran HP into the ground, thinks she can run a country...."
This is similar to coaches when looking at other jobs. Take Nick Saban when he was with the Dolphins, as an example. He said repeatedly and emphatically "I will not be the coach at Alabama." Of course, he was lying. And for a long time after that he paid the price in the way he was covered by the media and criticized by all. I say - what real choice did he have? He either denies it, and we saw how that worked out. Or he tells the truth, and one or both of the following happens: a) he loses the locker room in Miami, as that team immediately turns on him (and he likely gets fired anyway), and b) Alabama pulls the offer they'd made or considered making.
Note all of that is true while he's talking to them but has yet to come to terms. if he's already agreed and they have a deal, the honorable thing is to announce that and walk away from the Dolphins (but even that would have been met with much ridicule - see Petrino and the Falcons).
I'm one of those right wing knuckledraggers that lamentst the loss/de-emphasis of Judeo-Christian ethics in this country....but in those 2 situations, not sure how either is supposed to be completely candid....