I read what you posted on that article and you only present one side of the coin, you only present the good aspects that make margin trading attractive and why many people try to use it on the first pace, why do not we talk about the other side, if you lose 10% in a single trade if you leverage that with 10x then you lose all your capital, and if you use 100x then a 1% loss is enough to wipe out your account.
I think you are taking the wrong approach here, the question should be who can trade using leverage and do it without destroying their accounts in days or weeks? And the only ones that can do that are expert traders, newbies should stay away from it until they have showed themselves they can make money consistently on the markets and they have a solid money management strategy.
Yes he didn't say that the leverage can also amply the loss not to mention that its hard to do it on exchanges particularly in binance because you have to be in the right page, right button and then shift to another page to place the order. Train yourself well because its risky and not as intuitive as spot market interface.
Remember that the loan will have an interest and when you execute short/long, you risk yourself with margin level which you don't wanna get liquidated.
And that bothers me, after all there is no need to hide it, to begin with almost all the information you could be interested in is on the Internet already, so anyone interested looking at margin trading will see that their losses can be multiplied as well, so what is the purpose of not mentioning in an article that tries to promote it? In my opinion there are only two reasons, one the person is not as knowledgeable about the subject as he is trying to make us believe.
Or the second option is that he is trying to hide that information from newbies because he knows they are not going to make any kind of deep research on the subject and they will begin margin trading despite the fact only experts should use it due to the enormous risks they are taking.