Why out of home marketing is preferred to Outdoor Advertising?

If I can interpret this question correctly here, the question might be why many prefer to sell and market from home instead of face to face. If this is the intention of this question the answer simply is "comfort zone." The home is a more comfortable environment and safer feeling compared to the everyday dilemmas of working in the field. Experts will say however that staying within a comfort zone is not healthy for individual or business growth.