Secrecy Surrounding Available Channels

Is there any reason why channels that are only available on the X1 platform are not listed on the channel guides provided by Comcast?

Having a disclaimer after these channels saying "Only Available on X1" would be sufficient, I'd think.

https://www.xfinity.com/support/local-channel-lineup/

On this site, it should show all available channels, not just those available through conventional means. When channels go IP, it removes them from the system, making them appear completely unavailable. This also makes it appear that international channels don't exist, when in reality, they're just IP only via X1.