What is your point?
Also, what you are stating about an inpatient psychiatric institutions is inaccurate. It is not a hotel. You do not just check in. Qualifications include being a serious threat to self or others, or unable to care for one’s self to an extent of being a danger to self or others. Individuals are screened prior to entrance to evaluate if potential patients meet these standards.
Your family member may have participated in IOP, PHP, etc. Those are programs that have lesser requirements for hospitalization.
Regardless, none of this is in anyway representative of MB’s mental state prior to the incident. How others reacted or behaved is in no way an indication of MB’s mental health.