In my opinion, he's making a poor decision - you have many many years to study anything you want, but just a few years where you can be a great athlete.
And this story is not relevant to any other players - they found the thing they love and they became great at it - just because they do not go study public health or some other irrelevant thing to them does not make them any lesser.
The journalist probably studied somewhere where intellectualism is supposed to be good just for itself. So for her, 'good' is defined by intellectualism. One could just as well turn this argument the other way round, and the pro football players could mock her for being so weak at sports.
This person has some passions and he's following them. This does not mean that every other person who has a passion in some field has to also have a passion in some unrelated subject that just happens to be offered at oxford.