cory of course people should be seeking treatment for mental illness and I agree that prescribing medicine at the drop of a hat is rare in the UK, though certainly not in the US (which was where this particular article was written from).
Going for counselling is exactly the kind of thing people going through a bad patch should be doing, rather than going to a doctor who forces a diagnosis upon them and treats that rather than the root of the problem (which a counsellor, by talking you through it, would).
Needless to say people with a genuine mental illness may only find life manageable with chemical treatment.
Hmm I agree with all your statements except the first. That's sometimes the problem, but sometimes it's quite the converse i.e. diagnosing someone and then pigeonholing them into having a condition which becomes a self fulfilling prophecy (and is more likely to lead to dependence on drugs).
Alameda neuroscience shows mental illness to be biological/chemical in origin. The problem is that the diagnostic tools are behavioural rather than physical, so it might be a chemical imbalance causing depression, but it would be statements like lacking energy/hopelessness etc that would typically result in the diagnosis.
As I said before it is very often the right thing to diagnose a mental illness and treat appropriately - with drugs and counselling. The danger is that many people who are simply suffering from "the blues" (I'll keep using depression here as it's somewhat easier to do so, but a plethora of other 'disorders' could fit) then get diagnosed with depression, start taking anti depressants, find it hard to cope without them, etc... it's a downward spiral.