I don't see how is that. Friends and making me better at work are different. People who magnify me at work often have completely different hobbies, livestyles and incompatible woldview about personal lives. Sometimes the thing that makes them.less friends (assuming they are respectful etc) is what makes them magnifiers.

I suspect they are seen together when people make work their complete social circle so their emotional needs are not met unless collegues fill them too.

well, maybe we use different criteria for finding friends. for me friends are people that i can trust, and that support me.

it doesn't take more than one thing of common interest to become friends (and that trust and support)

sometimes that common thing is a hobby, a lifestyle or a worldview. but sometimes it is work.

having friends at work doesn't mean that i hang out with those friends in my free time.

we have multiple social circles. at work, family, different groups of friends (eg different hobbies, each is another social circle), and in each of those circles we may have friends. some closer than others.