And that's a good thing for the article author too, because it gives them the chance to see if they're a fit for the job and could learn the required skills even if they don't have them now.
I think you're right on here, but I also think the benefits diminish the further a candidate goes in the process only to get turned down with an explanation that was known at the beginning. How many interviews does it take to come to that realization?
It's not like they want to waste a bunch of time interviewing you for a job you're ultimately not going to be in any more than you want to waste time on it.
It seems like this should be true, and I hope it is, but I have worked for companies that seem to interview just for the sake of feeling or appearing to move forward in filling a position. Maybe the recruiter or hiring manager is incentivized in that way? Some action, even if it's in the wrong direction, is perceived as better than no action at all.