You are framing the discussion in a certain way, and then attacking other people for things they haven't said, and doing so aggressively and from a position of staggering ignorance. The fact you cite Laing is telling - he's almost totally discredited now.
1) when you find someone who is actively planning a suicide you have a choice. Keep them alive until they get to a professional, or treat them yourself. You wouldn't (I assume) stick a pen through the eye of someone having a heart attack, but that's the rough equivalent of what you're recommending people do to suicidal people.
2) treatment for suicidality has two components. i) keep them alive until meds and therapy can take effect. ii) give them meds and therapy. Suicide prevention is wider. If you're talking about suicide prevention as a public health measure you should probably state that. If you don't know the words to use to specify what you're talking about that should be a clue that perhaps you don't know what you're fucking talking about and should perhaps be a bit less arrogant.
3) as part of keeping someone alive until they can get help: there are things that we know mostly work, and things that we know mostly don't work. "Low grades? That's a bullshit reason to die! They're not that low; you can retake them; I got worse grades and I love my awesome job so your career path could be like that!" is something that we know mostly does not work. We know because we talk to survivors of suicide. Since there are 112 Americans per day who die by suicide we have plenty of people to talk to. If telling people their opinions was bullshit did anything to change their minds you and other people wouldn't be having this discussion - you'd have changed their mind or they'd have changed yours.
4) reactive depression is still depression. It's still an illness. The cure for reactive depression is to change the thing causing the reaction, but also provide evidence based techniques to build resiliance.
5) if just telling people they were wrong worked we wouldn't have had such a high deathrate from anorexia. About 1 in 5 people with this anxiety disorder die from it (this number is going down)
> be an 21st century American thing, were individuals must absolutely remove any societal and personal causes for their situation. In these parts of Europe we find it OK for friends to help us see clearly what's trivial and what's not, and we had similar philosophies down to the time of Epicurus.
There are reasons for the high death rate to suicide in most (but not all!) parts of the US, and this probably is not one of them. Decreased access to treatment; poor quality treatment; judgemental and stigmatizing views; increased use of criminal justice instead of mental health treatment; easy access to means and methods; etc etc.