There are multiple issues here. One is the default assumption that suicide is irrational. This is likely born out of the fact that there is little meaningful study on rational suicide that even makes it to legislative places in the first place. Even less so when it comes to mental disorders, unlike say terminal illness or enduring physical issues. So the legislation often reflects the already outdated and dominant views they spring from. Doesn't help when the Daily mail paper prints yet another story on 'Dangerous suicidal schizophrenic murders stranger and eats mothers face...'
If you are being treated for mental health, this is further entrenched by the mental health act as you likely already come under being viewed as a vulnerable adult. Or your mental capacity may be in question. But the system is a hammer looking for nails and everyone is a nail currently for the reasons I outlined above. That and psychiatry seems so very flawed and reductionist in its approach to the point I could rant for days at its glaring structural failings. So in the interests of preserving life, it makes collateral out of some lives who do have rational reasoning. A lot of law is a variant of one for the many, in its attempt at mitigating harm. It is immensely complex and I often see that complexity narrowed in scope or reduced to a caricature on here. It gets even more complex when you throw in comorbid conditions. Drugs, abuse, gas lighting, and external conditions. Even various medications can throw up issues. Doctors are also covered by medical ethics so can override what a patient may want. That is another complexity I am not at all knowledgeable about.
As for, first responders do not have the luxury of carrying out a forensic level assessment of your suicide attempt then coming to a judgement, nor are they mind readers of your mental inner workings or your philosophy on suicide. They have various legal protections to act in the interest of preserving life and will simply do so. In the example of the shotgun. Did they do it to themselves? Is this youtube stunt gone wrong? Did someone else shoot them? Is there a note and should they waste time reading it? Their role is not to be a detective respecting your autonomy or rummaging around in drawers first to see if you have any sort of advanced instructions. At that moment they cannot know, every second is crucial and medicine is about preserving life It is not about your personal circumstances it is about the broader whole and their job role. Sometimes that broader whole can condemn you to a worse fate. But the person working on you can't know that. But they can be certain if they do nothing you die. On the other side of that is the potential of getting sued. So appeals to further entrench liability culture so people don't interfere with suicide seems pretty short-sighted.
You see a woman in a canal she is drowning. Do you move to rescue them or do you let them drown? I have purposely left out context because that is what it is often like for front line services or a random Joe spotting someone in seeming distress.
You see a person hanging from a tree. Flailing about and gasping and trying to pull on the rope. Are they flailing because of survival instinct or because they have changed their mind? Are those noises an appeal for help or a crushed windpipe and natural pained responses? Since you can't know and now all the responsibility to act or not act rests on you. Most will move to preserve life in that instance. I think that is simply human and nothing to do with evil pro lifers or even religion.
I do feel formal directives that have been pre-established should be respected. That it would be more humane to have an end of life service with built-in safeguards that also considers the chronic pain of mental disorders especially if treatments have consistently failed and quality of life is compromised. That can establish a setting where you at least get the ability to say goodbye without a heavy handed interventionist response. But you go full circle then to the first issue raised, what is considered sound mind when it comes to suicide? Seems some states and countries are making inroads there with legislation. My country though is not among them. In fact recently just watched the mental health act worsen considerably...
