Would the answer "Because I don't have a scholarship, and if I didn't take the loan, I can't go to school to get the necessary education to start my career" suffice?
Again, this is avoiding taking responsibility. There are plenty of people that graduated from college and got careers that compensated them sufficiently to repay their student loans. There are also plenty of people that didn't go to college and made enough money to afford their desired lifestyle. If someone signs up for a loan to get education in a career that doesn't pay them enough to repay the loan, then how is that anyone's fault but theirs? Gotta run the numbers before signing the loan.