And if you have a coach having sex with a student and do nothing but let the person go on to their next job and the coach has sex with a student at the next job that leads to a lawsuit, the first school who did not report the prior misconduct will end up in that lawsuit.
See the pattern here? Again, this is not a supervisor sleeping with a secretary. This is a coach/teacher having sex with a student.
It is pretty basic. Professors and coaches cannot have sexual relationships (consensual or otherwise) with students. When they do, they are certain actions that the school must take against the professor/coach, not the student.
This is what many seem to be missing here. Consentual or not, the law treats students in these situations as victims and the onus is on the schools to protect them. The law does not treat the professor/coach in this situation the same way its treats the student.