Colleges hire the people that apply.
k-12 jobs can be had with a degree in "education" whereas college jobs require specialization in the particular field.
The pool of education majors is much larger.
Just to be an "instructor" in a four-year private college requires you to have a Master's. State colleges and universities typically will allow no one but Ph.D.s as regular faculty; you must have a Master's just to be an ADJUNCT instructor.
Maybe this lady needs to go back to the 'hood and wise up the younger bruthahs and sistuhs, let them know that getting an education doesn't mean you're "actin' white" or whatever they say these days.