@BohumilaBenedikt,
As interesting as this seems, I wonder where the question is... I am sleepy though, so my bad in that case.
Now if you are justifying it, well, lets say you have this addiction... Does it make you happy? KEEP IT! HAPPINESS IS THE WAY OF LIFE!
Does it make you suffer? Leave it, why hold on something that causes you suffering so tightly?
In the end you can talk about facts, statistics science, but the choice is yours, and only yours.
Now if people do not understand you and that causes you pain etc etc, perhaps those that do not understand you, have no place in your life (its yours you know), but if you want to keep them more than the addiction... Then the power of free choice is again, all yours (Protip: whatever makes you happy(er), or at least less unhappy if you are that kind...
So my advice? Choose whatever makes you happy. How much easier can it be? While others tend to ask themselves how much harder can it be... sigh... complicating things is just silly...