The relationship of the toastmaster to speaker should be the same as that of the fan to the fan dancer. It should call attention to the subject without making any particular effort to cover it.
Ultimately the bond of all companionship, whether in marriage or in friendship, is conversation, and conversation must have a common basis, and between two people of widely different culture the only common basis possible is the lowest level.
Interdependence is a fundamental law of nature. Even tiny insects survive by mutual cooperation based on innate recognition of their interconnectedness. It is because our own human existence is so dependent on the help of others that our need for love lies at the very foundation of our existence. Therefore we need a genuine sense of responsibility and a sincere concern for the welfare of others.
We die to each other daily. What we know of other people is only our memory of the moments during which we knew them. And they have changed since then. To pretend that they and we are the same is a useful and convenient social convention which must sometimes be broken. We must also remember that at every meeting we are meeting a stranger.