The bottom of that “study” is all you need to know about that study:
To better understand how a student loan payment shock may impact a consumer wallet, lenders can leverage TruVision Premium Student Loan Attributes, TruVision Trended Usage Payment Ratio Algorithms and TruVision Trended Liquidity Algorithms.
All that shit was basically just an ad to sell products to financial analysts. CNBC took the bait and advertised the products for them.