First of all, the entire field of psychiatry is very dubious. It's nothing similar to a mature science. They aren't really doing objective evaluations. For example, very often, if you really want to take a medication, you almost certainly can find someone who'd write you a prescription for it. [1]

Also, why would someone's academic qualifications entitle them to essentially sentence a suicidal person to death?

[1]: e.g "Also, if by some chance a psychiatrist doesn’t give a patient Adderall, that patient practically always goes to another psychiatrist, and that next psychiatrist does." (https://slatestarcodex.com/2017/12/28/adderall-risks-much-mo...)