I think you misunderstand my position. I’m not a cultural pessimist saying social media made us all into mindless zombies. You can use social media very actively by putting much thought into your posts and conversations and researching them thoroughly. And there is alot of stuff you can mindlessly consume at home long before the internet.
What I’m saying is that Bullshit Jobs created a whole new demographic with time on their hand to idly use online (since they work on computers) but not enough to be productive. As I wrote in another comment, in the time between meetings when a mail might come in or your boss might bump into you, a social media timeline is the way to go. You don’t have a TV in office but access to the internet.
You are right that not all Bullshit Jobs have the idle time I’m talking about but enough to create this culture. But I can’t say it better than he himself:
David Graeber, Bullshit Jobs 2018 (p. 382 of 895 in my ebook version)