Yes the point of a curation trail is to be exclusive, so that the people in it fit a certain niche or fit a desired need, which then creates the value for others wanting to follow the trail. If you follow that trail, you know you are supporting people who create good content on the platform and you only know that because it is exclusively handpicked by Kenny, who is a trusted Steemian by the community at large. Otherwise the votes would just be going out to everyone and then there would be no point for a trail to exist or function.