I wouldn’t consider the rates here [1] low at all. Parent PLUS loans are sky high at 6.28%.
I suppose you are talking about private loans but they have their own set of downsides.
[1] https://studentaid.gov/understand-aid/types/loans/interest-r...
[1] https://studentaid.gov/understand-aid/types/loans/interest-r...
PLUS loans are supplemental loans with a higher rate than regular direct undergraduate (3.73%) or graduate/professional (5.28%) student loans.