Unlike the author I know what I am talking about because I am an actuall Mexican.
That means you don't know what you're talking about. If you are immersed in it you definitely won't be confused about it at all. This article is written for people who are not Mexican observing from the outside.
It's like someone from the US claiming the imperial measurement system isn't confusing. The more immersed you are, the less relevant your view is to outsiders.
That stands for everything, and it would still prove that it's not the thing that it's confusing, but it depends on the familiarity (or lack thereof) with it.
'I'm leaving for the airport soon.' This probably means within a few minutes or hours.
'Soon my kids will be all grown up and leaving for college.' This means anything up to a decade or more. Nobody would expect my son to leave today, even though the wording is the same as my airport declaration.
This rarely causes any trouble, despite the large difference in meaning.
"I'll be leaving soon" probably means within a half an hour.
"It'll be done real soon now" - means possibly never, but probably eventually.
If I asked when will the ice cream get here, and they answered soon, I would ask them to clarify, or just leave, knowing they had no idea themselves.
"When will we get there?" "Directly"
"How far is it?" "Down the road"
Me: Ah, it's going to be a bit.
No idea what time period I meant there? That's fine, I probably didn't either. But somewhere between two days and two weeks depending on when the due date was.
I am from Spain where you wold think we have a more "european" time management sense. Yet it is common to say: "ahora nos vemos" or "hasta ahora" (see you now/soon) as you are leaving the room, when you know you are gonna meet the others later in the day. It if you ask someone when are they going to do this thing you asked them to do and and they reply: "ahora"... it actually means "when I finish what I am doing now". It is true that in a business setting and some context you might need to be more specific, but that still does not change the meaning of ahora. It is also a ok reply "ahora, cuando acabe con esto", which means--"soon, as I am done with this", or even more specific: "when is the concert going to start? Ahora en 15 minutos."
"Ahora" simply does not mean "now" as in the current instant, but in the "present", this is, the time of the events that are connected to the current activities, the things that you can "wait for", the things that will happen before they are out of your head... it is like "soon" or "soon today", but with a hint of will, of promise, of certainty or fate.
There are different words and phrases for each length of indeterminate time. That's apparently not the case with the word in the article, and that's why it's confusing without broader context.
Meanwhile, I'd wager that other cultures (perhaps from Europe or Asia) tend toward being more literal about how they indicate time. This article would therefore be useful to them.