I'm having a hard time thinking of ISAs as much more than a ridiculously high interest loan, especially for those who are self-motivated have a high probability of landing a job after doing X course.
E.g. Lambda school is $20k if you prepay and maxes out at $30k over 2 years, which is effectively a 45% interest loan. Even if you didn't have the cash (or didn't want to fork out) the cash, a typical loan taken out today will have a single digit interest rate.
Personally I'm completely happy with my federal student loan terms for the $20k or so I have left to pay. I stretched it out to 20 years, pay a 5.5% interest rate, the interest rate is deductible you make below a certain income, and barely think of it outside of doing my taxes.