Hmm. unless there's something I'm missing, it should be shouldered by them like what they're saying in their article. Gdax which is previously coinbase pro also did the same. In any case, testing the withdrawal tab just to see if you'll be paying anything could be something to double check before depositing funds.
https://i.vgy.me/2dK1KQ.pngWithdrawal fee, in this case, means the *extra* fee they charge other than the blockchain transaction fee, which in this case is none.