Your question is worded slightly awkwardly, but I think your question is: How hard is it to start a drug habit vs. How hard is it to stop drug addiction? Essentially, you espouse a stylistic way of posing the rhetorical question, in view of the fact that the same person who is addicted is the one who tried the drugs to begin. In short, it is not "hard" to start using drugs, and thus, a drug addict has brought hardship on himself, by himself.
The question suffers for its poor readability and ambiguity. Are you denouncing "illegal drugs."
Then, do you agree that 'what is illegal or illicit', and 'what is licit or legal' are questions that have no basis in morality, ethics, or any doctrine as a whole. These are arbitrary judgments. It would help to clarify your question.
On that note, the question is rather superfluous in that it does not restrain the scope of inquiry, but rather, it is posted in a mocking style, where it's not even clear what the precise matter is.