To provide connectivity to 4 screens at full 4K at 60kHz, then it has to connect to all 4 USB-C ports, since each port provides the bandwidth to only one screen. Yeah, it's a clunky port, but that's how it has to be if you want this level of functionality in a dock.
Regardless, if you do want to connect to 4x 4K screens without the dock, you will still need a cable connected to each USB-C port, so in a way, this dock is actually neater, and lets you bring your MBP to this desktop setup and connect in a much cleaner and simpler way.