You don't need to stream. You have the option to download the tunes.
Yes I know, just thought that I should mention that streaming has some disadvantages that may not be immediately obvious. I like that the option is available, as it can be convenient in some cases.
TV also sees iTunes Match as a separate entity this way. It should just be like your very own Pandora, ready for you to play/stream whenever you want, not requiring a System Prefs level toggle.