If you have never taken these medication you have never known what it is like to try to stop them. Heroin could be considered a life saving medicine in the same vein.
Prozac artificially increases serotonin as as a result your serotonin receptor density changes. So trying to stop the drug, not only do you end up with all these horrible side effect, but your depression will be much worse until your receptor density normalizes again.
There is a biological marker for the need of insulin. There is no such thing when it comes to prozac.
There is a biological marker for the need of many drugs too - it develops over time with use (and then stays for a long time).
Anyways, I agree with you w.r.t. many psychiatric drugs. Don't try to spread that into psychedelics though - completely different, it has enough of its own problems and it's not necessary to make up some non-existent on top of that.
