“Rav Ovadiah Yosef disagrees with this, He allowed his daughter Adinah Bar Shalom to open Charedi College and when he was alive he taughter classes there.”
The question is not college, but rather hearing kefira at a chiloni college. Rav Ovadia Yosef might agree with Rav Moshe Hillel Hirsch because ROY encouraged a Charedi college, perhaps as an alternative to a chiloni college.