How does the fact that this is an untrained performer make this video even more relatable when addressing the fact he is performing social dances (as opposed to theatrical dance styles such as ballet, modern dance and jazz dance)?

This video is a reflection of the social dance styles of the latter part of the 20th century. You probably have a point of reference with many of the dances shown and certainly can relate to an obviously untrained performer executing these dances. How does the fact that this is an untrained performer make this video even more relatable when addressing the fact he is performing social dances (as opposed to theatrical dance styles such as ballet, modern dance and jazz dance)?