I think what the article is trying to say is that employers' arguments are more often bullshit than legitimate (and obviously, both sets of employers think their arguments are legitimate), so usually they should just give it a shot.
Unfortunately, that's not meaningfully different from, "I want X, you should offer X." It is basically the same as saying, "I want X, some companies do X, give it a shot" in persuasive power.
I love working from home and have done it for most of my career. The next job I take will probably be in an office though for a change of pace. I honestly find that despite my personal affection for it, most arguments in favor of remote work really just aren't very compelling.
"Some companies do it successfully" is not compelling to most companies. It's a disingenuous portrayal of the real difficulties and sacrifices that need to occur for remote work to be successful. Remote work rarely works partially, because without a deep seated remote culture the employees who are not in the office will be fundamentally left out of subtle but important group interactions. If you are the only remote employee on your team, they're not going to video conference with you to have a spur of the moment discussion that leads to a business insight. Conversely, asking a company without a remote culture to change is asking all of the employees who are already there to embrace a new, unfamiliar culture where they can't just lean over and ask someone a question.
It's my personal opinion that there is a very vocal minority that wants remote work to succeed, a more silent swath larger than the first that is indifferent, followed by a supermajority that silently disapproves (or at least, wouldn't want to work in such an environment). Even though I enjoy it, it appears selfish to me to ask companies to offer remote work without significant evidence it will work for them, all the while imposing a real communication cost on employees that work there who already thoroughly enjoy the status quo.
It seems to me like it's similar to a lot of other things in professional life: you can't have everything, and if this is really important to you then find a job that offers it. But don't expect companies to alter their organizational machinery to cater to you when they have no reason to.
Vacation days weren't compelling either. There is no business case for vacation days like you're asking for, except, similar to WFH options, it makes for happier employees. I'm sure you'd scoff at a company offering no vacation.
Also, it's sad to label employees preferring benefits and choice as selfish, vs huge companies sitting on piles of cash maybe losing .00000005% in productivity, if that's even true.
The same old arguments get trot out, and your arguments show where you are professionally. Business insight? Sorry to say but most people work to collect a paycheck. They don't make decisions, and typically their "insights" are ignored by management anyway. For every "insight" from a group discussion, there are just as many people working on their own, making important discoveries or taking steps forward.
This isn't band of brothers. I don't need subtle discussions or have to pick up on social cues nor am I a manager who has decision making power. I don't need to form lasting bonds with anyone. I just want flexibility with my hours to make my life more convenient-and a place that values that will get a lot more out of me than a place that doesn't. That is what the essay says: if you want to expand your options in hiring, offer at least partial WFH. And put me in the boat that agrees with that.