The scientology comment I made was for the video because this is typically the kind of evidences they use. They hate psychologists and psychiatrists, and they deny the fact that disorders like depression, bipolar disorders or social anxiety exist.
In some case, medications will be necessary for whole life... I'm thinking of bipolar disorders, schizophrenia, etc...
For the rest, depression or other possible disorders, pills can be used as a support, but they won't cure you.
But they are both drugs that were made in a lab.
Well... this is not completely true... Labs that make illegal drugs doesn't fulfil all the quality and security criteria you would expect from a real lab... For example, cocaine is made with fuel mixed with the coca leafs, cement and other stuff in a concrete mixer. If a lab was making its antidepressants (or whatever you want) like this, for sure they would be in big troubles

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What about the people that have gotten worst and as a result of taking pharma drugs become MORE SUICIDAL ?
Some of this pharma drugs have killed people
Yes, what you say is true, and no one can say pharma drugs aren't dangerous, but 1) less people taking pharma drugs die than those taking illegal ones.
2) some die because they didn't respect their prescription (again pharma drugs are dangerous), because they were allergic to these or because the pill wasn't adapted to them.
To avoid accidents with pharma pills, it is necessary to stay in contact with the doctor that prescribe it to you, to tell him about your side effects, how you feel, etc...
I guess my point is that taking pills because you are sad, nervous or have a headache or whatever because you want to feel better is unnecessary. There are better ways of dealing with these problems than being doped up on all kinds of funky chemicals with various side effects.
About side effects, see what I wrote before... In certain situations, pills are needed : for example people suffering from bipolar disorder, therapies will have no effects one them because it's a chemical imbalance in their brain... In my case, I had a very deep depression just a few month ago, because of my SA. I had very deep suicidal thoughts... I began a therapy to fight my SA, but it didn't really helped me until I began a treatment of antidepressants. It helped me because I felt less depressed and more combative. I'm still taking these pills, but no, I don't want to spend my life taking them.
So you take some pills now and what if you need more dosages and more and more?
If pills don't work for you, they will increase your dosage. But it's impossible to increase the dosage indefinitely, so generally, doctors will give you another pill. If none works... then another solution is needed, but generally, it's not the easiest one...
Ok, sorry if my reply is a bit chaotic and not very clear... but, I'm french so it's not very easy for me to explain completely my point of view

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