It really isn't. Well, okay, it actually is, but that more speaks to how pointless this issue was.
Much like with "We can't have online activation DRM, that isn't steam, because people are active duty military who are overseas!": Yes, there are people who are going to be negatively impacted by this. But they are very over emphasized and mostly used as a tool for those with other grievances.
Because if you have an emergency hidden phone? You turn that shit off when you aren't using it. You want to make sure the battery is still charged when you need it and you can't really leave it plugged in and go to sleep. Same with worries about low battery alerts, amber alerts, etc. Or even just it vibrating and making noise if a telemarketer calls.