Earlier quoted context omitted.
I think you need to keep reading. Finasteride blocks the enzyme that converts testosterone to DHT, which initially raises your testosterone levels. Your body reacts to this by secreting less luteinizing hormone, which results in less testosterone production, and your test levels return pre-finasteride levels. This is the suppression of natural testosterone production, and is exactly the same reaction you’d get from d…
I see you added "which you’re not going to notice unless you ever stop taking it."
Taking moderate doses of steroids is also massively beneficial in many ways, with the worst of the side effects typically occurring if you stop taking them. But a lifelong dependency on a drug with a long list of adverse side effects is not a good thing, especially when ceasing treatment has its own long list of potential side effects.
Finasteride does suppress your natural testosterone production. If you intend to take it every day for the rest of your life, and are happy to gamble that you don’t get any of the other side effects, then maybe you’re happy taking that risk. But this is clearly not an ideal treatment, and I suspect most people who are prescribed it aren’t properly informed about these risks.