Because in your world the only way to help people with depression are anti-depressants? Unlike the real world where people have various options (e.g. psychotherapy)?
Pretty sure the grandparent post was satirical. Hence the "this post NOT brought to you by the pharmaceutical industry".
In my world people aren't encouraged to start any sort of professional treatment as a first course of action, as it totally externalizes one's locus of control and robs them of the ability to help themselves through learned skills of introspection and metacognition.