I am at my parents' house. I love them dearly, but every time I come I am reminded why I find the place "uninhabitable" — once the TV is on, it takes over the entire (open plan) space, and the only sanctuary of sanity is a bedroom. Even then, there are all the intrusive jingles of TV quiz shows.
Sometimes seniors, for numerous reasons, have nothing better to do than watch TV. Deal with it. You will miss them when they are gone.