Channels suck.

They are an old-fashioned idea stuck in the days of linear scheduled television.
Even if you could purchase certain channels... they still broadcast one show at a time... literally AT a certain time.
We're in an on-demand world now. Wouldn't it be better to subscribe to a service that let you watch the "shows" you wanted to watch? Whenever you want?
I understand the concept of purchasing individual channels... but those channels will still broadcast stuff you won't want... and they broadcast while you're at work, or asleep, etc.
It doesn't seem like you would be gaining much.