You do have a point to the extent that everybody plays hard in rugby, but no, they don't play equally hard. Wilkinson hits harder than anybody, against blokes who are often bigger and heavier than he is (I saw him smash Martin Johnson down in a club game once and I swear the contact registered on the Richter scale), besides which he's often targeted in his own right because of his importance to any team he plays for. All in all, physically that lad is writing some very hefty cheques which his body is going to find hard to cash as he gets older.