Re: Puh-LEEEZE!
Their argument is pretty stupid, but yours isn't exactly great either.
"One could make a compelling argument that the entire Apple iThingie ecosystem (specifically including the Apple Watch) has a negative effect on public health, what with its promotion of a sedentary lifestyle, and demonstrably addictive presentations that tend to disable one's brain during use."
The Apple Watch, a device that famously turns exercise into a game where if you skip a day, you lose, is "promotion of a sedentary lifestyle"? I don't think you should need a watch to tell you you haven't walked enough, but from those I know who have one, they're frequently exercising more to make their watch fill in their daily goal system, and if they've been stationary for long enough, the watch tells them to start moving again. They've built their fitness software to discourage a sedentary lifestyle. Whether they've done it correctly, and as I haven't bought one I'm not sure, is debatable.
Also, the applications people use when their brains appear turned off are in most cases not written by Apple. The people you're complaining about are likely using one of a number of apps from social media or gaming companies, and they happen to be running on an Apple device. I don't know that I agree with your complaints in general, but it's akin to blaming the computer manufacturers or browser writers when you don't like what people do on the internet.