When an article gives a personal account of someone feeling impostor syndrome, one possibility is that they are trying to tell it to readers who might need to hear it, or who might tell it to someone else who needs to hear it.
What's potentially a bad effect of the impostor syndrome concept is when it causes very rational and needed self-doubt to be dismissed. So, instead of thinking, "I need to figure out how to be better at this," one might think, "Ha ha, my impostor syndrome must be flaring up again. Which means I'm even better than the evidence suggests."
(BTW, management-ish articles usually seem to be about self-promotion, one way or another, and I think it's just accepted as something a savvy person does. I try to pick out useful things, but don't assume (as I might with some other genre) that the writer believes what they are saying, nor that they think what they are saying is actually important -- even though both might be true, despite the conventions of the genre, as they might be true with this particular article.)