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.
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.
I've played quite a few games that were addictive but not fun. The difference is hard to spot when you're in the middle of it, but stark from the outside. Typically they start off being plain fun to draw you in, and then gradually segue into addictive after a few hours to keep you there.