Arguably, framing someone's life behavior as functions of usefulness is antithetical to the need to engage in recreation. The following of TV is useful if your social sphere is amongst other people who watch TV. It builds a canon in which to socialize, discuss, invite people for watching parties, etc.

(I myself do not watch tv but I also have no desire to presume anything of people who do. I at least personally acutely feel a loss of culture because TV and movie watching is very common in socialization rituals and I am unable to engage in them.)