I have seen stats about genetic dispositions, yes. Wikipedia says 40% of a person's risk of having major depression comes from genes.
Still. One thing is that you don't know what your genes are. Your genes might have less of a risk than you think. But also, maybe an increased risk can be dealt with through lifestyle choices. I'm not saying people shouldn't take meds if they want to take them, and I think personal choice is extremely important. But the meds do have annoying and somewhat harmful side effects... so I suppose that has to be weighed up in a decision to take the meds or not.
Yes this makes sense to me. I definitely think we should look for better ways to deal with mental health problems. And yes you're probably right that we should have a better standard than simply "you can now slave at a job, therefore you're healthy".
I think one good solution for mental health problems (maybe not always, but it can work) is talking to somebody who is willing to listen. This can be hard to find. But there are mental health charities out there who do great work in talking to people who are having problems. There are support phone lines and things like that.
"The status quo, preoccupied with biomedical interventions... is no longer defensible" ( documents-dds-ny.un.org )
I looked at this blog post and it mentions a UN report which seems to be quite critical of modern psychiatry....