The problem is, for many people (and now leaving the specific example) this sort of info is what they would and should look up at first.
In hindsight you may think you overthought something and should have just started earlier but maybe you really weren't ready.
Again, don't overdo it. Do something real, look up a simple beginner way to do it, research it for 1 hour or 1 day, then stick to that simple beginner way for some time. The point is to do that thing and not get bogged down by details and researching the tiny things that only matter to the elite expert.
Also, you have to accept some risks. You'll never be fully prepared. You may hurt your ankle by running too much, but it most likely won't be permanent and you learned a lesson.
My core criticism is that the notion of "doing the real thing" is very poorly defined and can be easily misinterpreted. That makes this article potentially harmful advice to broadcast. Mind you, it might be good advice for specific people, where you know their circumstances very well and can clarify all the undefinedness, but it is too poorly defined to just send to unknown recipients who mentally fill in the blanks of the article in many, unknown ways.
It shouldn’t even be a long one. I said “go run for a bit”. If it hurts at all, stop. Don’t do things that you think are dangerous. If you can’t run or aren’t sure if you should, then just walk. Maybe I should refine my advice to “do whatever is closest to the ultimate thing, that you can safely do right now”.