It doesn't give you the guarantee that you're gonna make double or triple the money that they borrowed which could make them borrow some more.
That's what newbies don't understand, they believe they can easily make the money they borrowed back within a few day which is not really like that. Most of them started trading during bull run so they don't know bear market will come, so whenever coins start to drop in price they run and borrow money and they think the coin will bounce back immediately and it will double their money within a short period of time which is wrong. After borrowing money and buying the coin if they see this kind of news they panic and sell.
Regarding that kind of news/headlines, for some expert or whales they take it as a good news because they could buy bitcoin at cheaper price, but for the others that kind of news could be their way to be panicked and you could guess where they're heading next.
Experts want bitcoin to dump more so that they will buy and hold. Some news like this are created by the whales just to scare people that don't really understand crypto so that they will dump it.