Borrowing money is not a wrong idea but what you're borrowing such money for could be the problem but if it's in a good investment asset which you have done your background check on it, then you're good to go (it's called good debt). But the one narrated in the OP which is about borrowing to trade or gamble, that's bad debt and it can ruin you. It's inevitable you wouldn't be under pressure gambling or trading from a loan money because you'll eager to meet up deadline.
No business started with loan can be risk free even if you did a very thorough background check, it is not that I am disputing your point but even business with good backgrounds after research tends to be seriously under pressure if the funding is on loan, take for an example the investment into bitcoin which already according to research already has a very good chance of being profitable is still very risky to have your investment in it coming from loan. Even top business owners usually go for partnership or grants, and only go for loans to help boost an existing business.
Trading with borrowed money is something I even consider as worse than the usual gambling we have, for me when I hear news like this I usually just see the victims as people looking for quick gains only, trading with your own money is risky then going for loan to trade triples the risk in my opinion