Earlier quoted context omitted.
How do you know it's online bullshit and not a time-sensitive message from family? I'd never do it mid-sentance, but if I hear my Whatsapp notification tone then I will make a mental note to check that fairly soon, because sometimes it is something important
At what point did society, unprompted and unquestioned, shift to using the Whatsapp phone app for actually important urgent serious things instead of, y'know, SMS or a phone call?
In some places the switch to these apps took longer (like France, because SMS had been free for a long time) but there is a fundamental asymmetry since SMS is free only for part of the users (so the others will never use it) while the apps are free for everyone. In the end, everyone ends up mostly using these apps.