It’s appropriate for the device’s functionality. 4K HDR is at most 40Mbps. If the device supported large local storage and offline playback, you’d have a point. But given the device’s use case as a streaming client, I doubt you’d be able to find any workload that gets close to saturating the network. Even if you could find a content source that was higher than 100Mbps, it’s unlikely the decoder would be able to keep up.