Nah. Even people in the industry are starting to wake up to the ethical questions that come with making addictive products. E.g., this thoughtful piece from a game company on why they're abandoning the free-to-play model:
Also, the two aren't as far apart as they seem at first. There are a variety of groups for helping people quit games. [1] I've had friends say it was easier to quit smoking than it was to quite Warcraft. And when doctors say, "sitting is the new smoking", they aren't just whistling dixie. [2]
[1] E.g.: https://gamequitters.com/ or http://www.olganon.org/ or http://cgaa.info/
[2] http://www.cnn.com/2017/09/11/health/sitting-increases-risk-...
Addiction can be horribly destructive without causing physical harm.
I don't know how bad these apps are. Gambling apps can be as bad as a slot machine or a roulette wheel, but we have no idea what kind of psychological damage the more insidious ones cause.
And there is physical harm. Obesity is a public health crisis. I don't know to what extent these apps contribute to it, but it's not zero.