Manbao's identity is somewhat special. She is a folk doctor, not an imperial physician. If the Crown Prince really intends to follow in the footsteps of the Prince of Yizhou, many people will inevitably be implicated.
Manbao has been treating the Crown Prince for a while. Speaking of closeness, they are merely in a doctor-patient relationship. She is young, only capable of treating illnesses;
Saying that they are not close, yet she often frequents the Eastern Palace and knows the Crown Prince's body the best. The Crown Prince doesn't trust even Director Xiao of the Imperial Hospital, only allowing her to give medical consultations, which shows a glimpse of this trust.
Therefore, if something does go wrong, implicating her is possible, but not implicating her is also possible, depending on how the people in power see it.
Clearly, the possibility of implicating her is greater.
