I think "Your Brain Needs Idle Time" is more important than the effect on random social interactions.

That definitely applies to me, but I'm not sure everyone is the same.

Some people have the TV on every waking minute of the day, no matter what else they're doing. Some listen to music or podcasts in the same way. Others scroll through social media whilst eating or walking or even during conversations with other people.

It's not a new thing, either - constant background TV was definitely a thing at my grandparents' house when I was a child in the 1980s. Personally, I find the idea horrifying but I accept that I'm a bit of an outlier!