In practice it is rather difficult to ask an enthusiastic person to tone down the enthusiasm. So this particular code has a high use value. It makes the point very clearly and very directly.
Eating fast does not provide better tastes than eating slowly. Some people dislike being hurried along. Everyone has a pace which suits them-similar to a 'natural' speed when driving along a road.

Should the slower person hurry up to keep up with the faster person? Or should the faster person slow down? Code 12/7 suggests the latter.