^Right. Are not paradoxes intrinsically contradictory statements?

But I won't that point.
In your example of that drug, you are faced with a choice - you either need to take it to make sure your bypass surgery is a success and you survive, or you choose not to take it to make your blood clot naturally. You can even take this one step further and choose not to have that surgery to begin with, so as to make your blood clot naturally. Obviously, a rational human being will take the one which will increase his chances of survival (self-preservation).
It may not be the most convenient choice, but it still is a means to your ultimate end. Given your cognitive capacity, you are also able to establish workarounds, or just endure the situation for its natural duration.
In the same way, if you are fed up with society's restrictiveness, you are free to go out and live your own life outside of it. Nobody is stopping you from doing that. But, see, I don't see you doing that. Because even if you feel that you are being restricted, you will still choose to live within society because its overarching purpose in your existence far outweighs the benefits of being "natural" and "free."