Probably because it was only intended for communication with the remote, nothing else.
If that was true then why did they bother to use IP? The KPA has a capable IP-stack and will obtain an address from DHCP and appear as a host on your network if connected. I can't see anything preventing Kemper from implementing many of the same audio-oriented network-functions that gets increasingly common with other advanced audio-gear. The only physical obstacle is that the remote has to be powered from the network, but that can be solved with an external PoE switch. Any modern studio built to a decent standard has both wired and wireless networks and live stages too. It would simplify the setup in many situations if a lot of the I/O could be done via the network. (KPA-RM communications, DANTE or AVB audio etc.)