That would be true if this was for a telephone contractor's license, but it's not. There is more to Low Voltage than just telephone and you can go your whole career without ever touching a phone system and still have tons of Low Voltage work experience.
Why does the electrical contractors exam also have questions about classified locations, high voltage, low voltage, fiber optics, fire systems, data and communications? Because the holder of the license COULD perform work in any of these areas. Just because you only want to do one kind of work doesn't mean that you don't need to show your proficiency on the whole of what the license permits you to do.
The state of Ct for instance has a number of separate low voltage licenses that are more specific to type of work the holder does, like telecom, fire systems, security, etc. If you feel that the CA license is too broad perhaps you need to lobby to get it changed and good luck with that. But as far as I'm concerned the more knowledge the better.
-Hal
