Many people can, and much of the music heard on TV shows and in movies is indeed produced in home studios. To generate recordings that sound good enough to be placed in television shows and films, you need the capability to record, engineer, and mix your own tracks to the professional standard—as well as create and execute the parts and performances that the best musicians and singers can perform.
Thanks to the Internet, top-notch musicians and vocalists are available to you regardless of where you live. By searching online you can find musicians and singers who will record in their own studios and send you the files.
The key is to be sure that when it’s finished—regardless of where it was recorded—the vocals sound as good as the artists on the radio, and the musicians’ performances—and the parts they play—sound as good as those heard on current hits.