A Blood Test May Help Pinpoint the Right Antidepressant for You… but why do i need "the right anti-depressant" when my depression is caused by other people? why should I medicate myself when i wouldn’t be depressed if everybody else would just act in a more sane manner?

is it, really not a medication to treat my depression, but, rather, a medication to make me like everybody else? what is the point of not being depressed if i have to deliberately, chemically alter my state of consciousness to achieve it? if "finding the right anti-depressant" will be the solution to my problem of depression, then why wasn’t it decided for me when i was born, that this is the solution, and start me on anti-depressants at that time? once again, i ask: why should I medicate myself when i wouldn’t be depressed if everybody else would just act in a more sane manner?