We do believe that we live in a spiritual world and in the midst of a conflict between good and evil. But it's important to remember that most things aren't good or evil. Holiness is not primarily a matter of getting bad things out of our lives. Movies are bad. Certain words are bad.
Tattoos are bad.
Heavy and tight skirts are bad. All kinds of things can be abused, of course. And some things lend themselves to abuse much more than others. But when we concentrate on things, we're dealing with the wrong end of the stick. It's people who have moral problems, not things.