What I've found is that I tend to try to friends with my co-workers because I'm around them constantly. And I don't try to make friends anywhere else.
Lately, I've been realizing that even though my coworkers like me, and I like them, they are not really my friends. Nobody who leaves the company stays in touch with me. I almost never have contact with them away from work.
I share my hobby stuff with them during work hours, and they seem to enjoy hearing about it and engage with me, but none of them would actually want to join me in those hobbies away from work.
This has me thinking that I should spend less time trying to engage with them, and more time trying to find local groups that share those hobbies.
So, contrary to the article, I don't think "the loneliness of the modern office team member" is actually a problem. I think it's a big hint that they need to seek relationships outside of work instead.