Statistically, self-inflicted gunshot wounds to the brain have a higher success rate than Nembutal or other euthanasia drugs. It's painless due to being instant death and the chance of failing when done right is so low it isn't even quantifiable with the data we have.
I hear your point about wanting a peaceful method, but I guess it's just hard for me to understand it on an logical or emotional level since we're talking about an action that after which, you will cease to exist for the rest of eternity. To look at it from another view, if you question how much pain would you endure for a billion usd (or equivalent value currency). The overwhelming majority of people, if they are being honest would endure a tremendous amount of pain if they were guaranteed to have that money at the end. So death, being the nullifying event of all of one's suffering past, present, and future, would seem to be worth some pain following that metric.
Again, your points are not valid.
Where are you getting your statistics from that a self inflicted gunshot wound to the brain has a higher success rate that Nembutal?
Nembutal used in the correct way is 100% guaranteed and also peaceful, as you fall into a deep sleep before death occurs, therefore you essentially die in you sleep.
Three problems with a self inflicted gunshot wound to the brain:
1. Guns are illegal and for the majority unobtainable in most countries, so again access is an issue.
2. There is margin for error and if unsuccessful you will be permanently disfigured for life or completely brain damaged, therefore causing a great amount of worry, fear and anxiety which causes SI to kick in and will scare most people out of pulling the trigger. You seriously want to die and end your suffering, but not at the expense of failing and causing more suffering.
3. As stated in point 1, guns are illegal in most countries, so even if your point about a gunshot wound to the brain being more successful than Nembutal (which I highly doubt), society prevents us from making the choice a reality (which was your original point).
It's not about asking people or society to do it for us, it's about having access to the means necessary to allow us to do it ourselves.
Society currently does everything possible to deny access to such means, leaving people to suffer and resort to more barbaric and inhumane says to end it, such as hanging, jumping off buildings, jumping in front of trains, overdosing etc. all of which carry a huge risk of being unsuccessful, endangering others or causing severe trauma to others.