I have a similar opinion but based on a different process.
I have experienced that long term (and/or invasive) medications _cannot_ function and _not_ screw up your body's balance at the same time. This applies pretty much to any long term (or invasive) medication from what I see. Maybe we have not yet reached, as a species, a pharmaceutical level of knowledge that allows us to improve one function of the body without breaking something else in the body. Of course there are cases in which the improvement is much superior to the side effects. Take antibiotics and aspirin (although it is said that antibiotic poisoning is more and more frequent).
About finasteride, I have used it for quite a while and it was definitely screwing up the health of my reproductive system. Luckily when I stopped it the side effects went away. But boy were they scary in my case...
So, for me, it's not that finasteride wasn't working; it was working but making me impotent, so nature did take its revenge in the end...
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Oh, by the way, I do not look at success stories because most have no pictures and those that do generally show an improvement from NW0.02 to NW0.01, not exactly my situation...