The exchange of physical favors and money in academia is considered an unwritten rule, generally without risk. The exposure of the "Maochunmen" incident was due to Liang Maochun's inadequate networking, a situation that is not uncommon. However, as long as both parties involved in the improper relationship can gain something and meet their expectations, it leads to female students being unable to successfully enroll in doctoral programs as they wish.
(Note: The original sentence is somewhat ambiguous and combines several ideas in a complex way; the translation aims to preserve the meaning as closely as possible.)