I am sure a lot - maybe most! - of this "ghosting" really is just rudeness and/or abusing power. But in my anecdotal experience I was always way too busy to do my normal duties along with handling a hiring process, and I ended up stringing candidates along without intending to - in fact I felt terrible about it! Some managers accommodate the work of hiring by taking other stuff off your plate. Other managers dump too much of the hiring process onto you, even if you're already coding for 60 hours a week (my last job really sucked).
That said, note the extremely important caveat tucked at the very end:
> More than three-quarters of the reported job gains in the last month were concentrated in four sectors: government, healthcare, construction, and leisure and hospitality. Jobs in tech, finance, law, and accounting were essentially flat or slightly down.