Read the OP's linked article. Too much black and white thinking though true in most situations especially in business and work places while not in others. For instance, sometimes leaving a voice mail is set up by those receiving an unanswered call while the caller doesn't have their phone app set up to send a text and maybe doesn't even know how to do so. Many phone apps today have so many features for advanced users that simple users tend to just use default setups.
Other times the receiving person may be someone known to infrequently read their text messages so the only way to communicate is to have them pick up upon ringing or if they are voice mail oriented leave such.
Another situation is when the person being called tends to instead use their Recents phone history and can read phone numbers of recent calls. A person at a work place might see a dozen text messages left but in Recents see their wife called without leaving any message. The husband would expect the call wasn't an emergency since she didn't call back but that he'd just need to find time to call back when able, maybe to stop at a supermarket on his way home for some items.
With more thought, could probably think of other situations. Point being, consider a situation using common sense. Years ago, university types began teaching professional people in black and white ways to never send anything but short emails. Suddenly as someone using such early era email tools for years, I was occasionally getting push back by others.
What was really going on is managers especially in larger corporations were increasingly receiving so many daily emails that it was taking too much time for them to review them each morning. So they didn't want to be seeing anything but short summarized one liner text emails lists they could quickly address. But that was again a black and white response to a wide variety of situations.
My solution was to start sending only shorter emails but with txt file attachments for longer explanations and information. After the other person reads whatever, they may then talk one on one without wasting time being tangled up in difficult explanations. Sometimes the best way to communicate complex ideas especially in technical work places, is to write information out clearly instead of trying to explain whatever verbally face to face. In fact some people, especially those with English a second language, may have trouble clearly verbally communicating.
So just as with the phone etiquette link, one ought not fully buy into such narrow thinking by late era etiquette authorities.
