GP adapted the the form factor to his needs.
The remote form factor was created for a long gone use case of 'zapping' through channels coming from an analog source.
Home theater nowadays has no similarity with the interface needs of cable/satellite TV, so why would you be hung up on using the same remote control interface?
Remote controls have been tortured into fitting smart TVs with ever more ridiculous tiny buttons and confusing silk labels the remote control concept needs to be retired anyway.