That's the thing though, people
do run close to the edge. These loans arose from opportunity, and the opportunity arose from societal conditions and psychological compulsion. Just like people who procrastinate on their papers, there are people who put off paying bills, having a savings account, and doing timely repairs. These seem like different orders of magnitude in comparison, yet the kind of thinking behind it is not that different. Add having less money into the mix, and the life consequences of these decisions really take off.
As for societal conditions, almost everyone needs loans for something at some point, but taking out a small-time loan at a high interest rate is almost always a terrible option. Usually when there is a terrible option on the table with other less-terrible options, people don't choose the terrible one unless they really have to (or have absolutely no clue what they are doing). A rich person buying a BMW isn't going to take out a 300% loan on the car because they have other options and it's a literal waste of money for them. However, a poor person who's 1998 Toyota Camry broke down and needs to get the most bare-minimum used car to keep their only job has to suck it up and pay the 300% loan because they have no other options. By the time it's all said and done, the poor person paid a lot more relative to the cost of the item they bought even though the total amount may be less.