Why? Having the means to do so is very very different from forcing it upon someone. Means to kill someone else are readily available to everyone -- kitchen knives, over the counter drugs -- but simply their availability isn't that scary.
What were they giving to the patients? Was the existence of what they were giving to those patients a scary thing just for existing - coz that's the question here.
Not really, tens of millions would line up for it; it'd be vastly better than surgery and plenty of pills can kill people now but we deal with that just fine and death is much scarier than sterilization. What you're doing there... it's called fear mongering. If you're really scared of something like that, you probably have some issues you need to resolve because that's a silly thing to be afraid of.