You do realise media days are contractual, and not just something the teams ask the drivers to do as a favour?
So horner, newey and vettel were only there due to contractual obligation?
Even when hamilton does show up he often doesn't look happy - as I said, good luck to mercedes when he's getting podiums, destroying rosberg and tells them to stick their commitments. Contract or not he's going to do what he wants (which is be as far from the press as possible).