Event photographers coming from Canon's prior Ethernet-based systems, like the WFT-E5 for the 7D etc., are used to being able to connect their particular camera to one particular service, like an FTP server. They absolutely don't want anyone to get into their camera without their consent. Not even seing it is one way to keep most of them out.
The WFT server mode is a step away from this, but it still requires a login to the camera.
Now they are combining this with some more "social media oriented" functionality, but I can see the pretty restricted heritage having an influence on what they design today.