Your characterization as “idle consumption devices“ makes no sense at all.
They aren’t exclusively solitary activities. A lot of usage has a social component (it’s communicating with friends). I don’t think you can seriously suggest that relationships forged across a distance are somehow not real or necessarily worse than social relationships you tend to in person.
You can’t just equivocate phones, games and TV – and with phones it‘s really all about the particular usage.
In particular this important social component (uses which allow for communication with other people are some of the most popular) leads me to always be baffled when people automatically connect phone use to being lonely or alone. It can be, but it not necessarily is.