Interesting link, thanks.

I've tried to reconcile that paradox by seeing it as a matching problem which requires both candidates and companies to be overwhelmed with attempts to find a good fit with each other.

However, reading the linked article gives another perspective on it. Which is, frankly, a worrying perspective for candidates, in that it suggests the labour market is shrinking and bifurcating (just like everything else these days) into "haves" and "have nots", where crossing from the latter to the former group may be getting more difficult with time.