Only around 1% or less of graduates from top schools (the Ivy League, MIT, Caltech, Stanford, UC Berkeley, UCLA, etc) end up with 6 figures of debt. In the Ivy League about 80% graduate with no debt. At top non-Ivy League schools average debt ranges from about $13k (MIT) to around $30k (CMU).
Even when you expand to include all schools instead of just top schools, 6 figure debt is rare. Average is about $27k for public universities, $34k for private non-profit universities, and $40k for private for-profit schools.
If someone has 6 figure debt from school they odds are overwhelming that it is from law school or medical school.
I wonder how many excellent students from non-rich families who could easily get into a top school for low cost or even free don't even bother applying because they have heard that myth of widespread 6 figure debt?