She said that "social distancing" is a medical technical term that doesn't translate super well to the public.
Which is 100% the opposite of what I in my daily life observe: everyone, young & old, private & work, calls it social distancing.
It addresses the issue better too, then the "proposed" physical distancing. When you pass people physically the (need and) possibility to keep that 2 meters is often impossible where as while socialising it very much is.
This kind of double meaning will literally kill people out there. Physical distance is a clear term. Social can and will be understood in many ways. I can imagine somebody thinking if he isn't on facebook on phone, he is distancing socially.