I've read the article, I do just want to clarify the statement "making social distancing alone ineffective."

It's still true that if you are covid suceptible, and if a covid-shedding person is walking around, you should try to be as far as possible from the covid. But, a brief close pass e.g. on the sidewalk, isn't as risky as sharing a 20'x10' office for hours, even if you stay >6ft the entire time.