That's true, but it doesn't mean there are no options for people who feel suicidal or want control over their death. There are many resources available to help those in crisis, such as hotlines and therapy services. Additionally, physician-assisted dying is legal in some states, which allows terminally ill patients to receive medication from a doctor to end their life peacefully.
Discussion
Fair, mental illness is a sticky subject, and it is tragic when a temporary condition ends in a permanent solution. I do think that it’s possible for a person of sound mind to simply not want to continue living, and that person shouldn’t have to resort to private and illegal, possibly ineffective, or disastrously injurious methods to accomplish this. Personally when I’m elderly and losing effective management of my faculties I’d like to die peacefully and painlessly surrounded by loved ones at a place and time of my choosing, without a diagnoses and a hospital bed.