


We can identify a common denominator of extremity and suffering, regardless of anecdotal evidence.
I'm not quite certain that level of intelligence or general motivation applies. Suicide may be committed by any manner of individual, regardless of personality type.

Fight or flight is the common result of the "highly emotional events" you talk about. Freezing in place is usually just the short-lived beginning of it - and, yes, soldiers and police train to reduce their freeze time.
But to get to the point - depression is often lack of emotion, which can be a trap in itself. You don't care about anything, which also means you don't care about yourself, including your condition. It's difficult to seek help (to do anything, really) without the motivation to do so - hence the trap. To me focus assumes a certain amount of motivation.
Mt. Rushmore: Three surveyors and some other guy.
Life goes on within you and without you. -Harrison
Hear the echoes of the centuries, Power isn't all that money buys. -Peart
After you learn quantum mechanics you're never really the same again. -Weinberg
I'm not sure the bolded is the case. The typical and normal basic human urge is one of survival. There are different personality types, but it appears that people who tend toward introversion seem to be more prone to depression and suicidal ideation. A person who internalizes stress can get to the point that the load seems too heavy to bear.
"God is the name by which I designate all things which cross my path violently and recklessly, all things which alter my plans and intentions, and change the course of my life, for better or for worse."
-C G Jung
"God is the name by which I designate all things which cross my path violently and recklessly, all things which alter my plans and intentions, and change the course of my life, for better or for worse."
-C G Jung

It's too subjective to really insult those who decided to take their own lives. I can understand if it was a criminal who decided to hang him or herself. That would be not only a case of selfishness, but ultimately cowardice. Now if it was someone who was severely depressed, then I wouldn't necessarily call it selfishness, it's just that person obviously had some problems and they didn't have the logical skills at the time to cope and adapt.
You do what you are. There's no denying what you were rigorously trained to do.

Looking at both your posts I have to wonder if those who seem to lack emotion have just gone one step beyond where you were. Having lived with fear for too long (and maybe not even recognizing it as such or possibly in denial of it) they have simply turned it all off or, like rubbing one spot of skin, have simply gone numb?![]()
Mt. Rushmore: Three surveyors and some other guy.
Life goes on within you and without you. -Harrison
Hear the echoes of the centuries, Power isn't all that money buys. -Peart
After you learn quantum mechanics you're never really the same again. -Weinberg
"God is the name by which I designate all things which cross my path violently and recklessly, all things which alter my plans and intentions, and change the course of my life, for better or for worse."
-C G Jung


Forgive me. I should have clarified that.
It's the case that, among the entire demographic of suicide statistics, all personality types will be represented. However, certain of those will be more prevalent, as being indicative of a greater proclivity to instability in that regard.