That doesn't mean it is wrong for a game to become addicting because it is so damn fun it just happens to become addicting. What is beyond despicable to me is to create a game that deliberately manipulates the human mind to become addicting without being of any real value.
If nothing else, it's a matter of opportunity cost. You are stealing attention away from hobbies, friends, family, and more likely, more wholesome forms of entertainment, possibly even more intelligent video games. Through in-app purchases you are funneling people's income from their bank accounts to yours and your employees'. This is fine when people are making a choice to waste their resources, but when you take people's choice away by addicting them, then you are effectively enslaving them.
But that wasn't my point. My point is that it's not terribly evil to make a game addictive. Addictive qualities are only bad to the extent that the addictive thing hurts you (e.g., smoking, drugs). These games are all pretty harmless.