When Hibs players finish training of a day what do you think happens?
Are they all living together and interacting with no one or are they seeing their families, going to Sainsbury’s or whatever?
Once outside the club they are under the same rules as everyone else.
The exemption is for travelling abroad for training and competition which allows them not to isolate when they return, regardless of their transport method.
In Duffy’s case, he travelled home from a training trip, he did not have to isolate as he was exempt and then he passed a test. He would also have had to have been cleared by the tracers in relation to the positive test they had.