I'm sorry, but your argument is just horrendously dumb. People are not chained to their desktops the way people are chained to their phones. Even in the most extreme cases of of someone being an absolute hermit with absolutely not leaving their houses, those people don't take their desktops into the bathroom with them to take a dump. If anyone is even remotely resembling that kind of lifestyle, they need to seek professional help because they've likely developed some sort of serious agoraphobia issue.

On the flip side, having your phone with you at all times is perfectly normal behaviour, given the convenience of phones these days and their general usefulness.