Right, but some will fiddle with settings and may not know much about what different settings actually do to output signals. And, some may have receivers with cross upmixing restrictions for Dolby and DTS. If they do not have height speakers and aren't concerned with Atmos or DTS:X, they can decode all signals in the player and they can potentially free up any cross up mixing restrictions from the receiver as it won't care about cross up mixing a multichannel PCM signal. There are so many combinations of devices and speaker configurations out there that there simply is not one universal setting for everybody.