Especially if that change of opinion allows you to defend DPC from our evil attacks
I already discussed the topic some weeks ago. If DPC is making it a big part of the plot, it should be better explained because loans and student's loans exist in real life and the way they are presented in game is at least tricky compared with how they work most of times in real life. If we are in a realistic environment and there's an element that doesn't really follow real life's logic, or uses a not very common approach to it, you should explain it.
Besides, it doesn't really matter if there are student loans that are paid in cash to the student and not directly wired to the college: in real life, a co-signer never has the ability to withdraw/withheld any funds from any loan. That's what breaks everything, unless daddy's threat is an absolute bluff. Which would be at least disappointing