Yeah, I've never understood the concept. Even as a religious person, it just doesn't make sense to me. I understand that many people are indeed genuinely caring and they do it out of a debatably misguided internal desire to help and serve others, but to me it just seems like swinging a bat in the dark, hoping that you'll hit something. In my mind it makes more sense to simply try to live according to the principles you believe in, and let people know that's where you're coming from... but you don't have to drive the point home by going out to someone's home. If there's an opportunity where sharing with a friend or associate seems relevant, fine, and if you're open about what you believe, anyone interested might come to you to ask about the principles you live by, but trying to "sell" it just seems like a foreign concept to me.