I don't think anyone here disagrees with your point. I found the article comment interesting, though, because the attitude it represents is not uncommon.
Most of us here have been in the workforce for a couple of decades (or longer) and/or have additional experience with the world of work through spouses, children, etc. Some (many? all?) of us have been on both the supervisory and the supervised side.
I would bet that every one of us has worked in or knows of at least one work setting in which there was one coworker who complained about everything, or insisted (grumbling all the way) that they couldn't change the way they worked (as all their colleagues had); or whose out-of-the-office record had a strange and unfortunate coincidence with Mondays and Fridays (particularly nice ones).
Similarly, we've worked with people who were, say, single parents who may have had to leave early routinely to pick up their kids -- but who skipped lunch or checked their voicemail or email that evening to compensate for the time missed, or people who had very tenuous childcare (or parent care!) arrangements which, sometimes, required them to take PTO with no advance warning, or people on FMLA who sometimes had to take a few days off at a time because of a flareup in their health or the health of someone they took care of (which is why they were on FMLA).
To put it bluntly, I think most people in a workgroup know who is working to the best of their ability and who is not. The ones who are not are the ones who likely will not be returning if there's a business-related restriction on how many people can be hired back. Perception is a very strong thing. Some folks may find the perception others have of them at work could lead to some missed opportunities.