Yes, ultimately everyone is responsible for managing their own finances, and it seems like the author acknowledges that and her own part in their mismanagement.
But expecting young people to make rational, fully-considered choices about taking loans in order to receive education is a tough sell. Higher education is often - sometimes unfairly - seen as an essential requirement for making progress in many careers. And in a situation where so many people are struggling with unmanageable debt, it seems that “every individual is responsible for their own choices” is a less useful position than “what is wrong with this system nationally and how can we fix it”. It’s kind of like US healthcare: participants are almost obliged to participate in the system, and for various reasons can’t be considered fully rational consumers.
There are lots of things that can be done, though. A change in culture making college education less essential; better loan programs; excision of bureaucracy; single-payer education systems; the list goes on.
The answer is a lot more complex than “college students need to make better decisions”.