This is not a boundary. We do not tag things in OSM so that they will appear in Wikipedia. If Wikipedia cannot cope with a collection relation then that is a problem with Wikipedia. If you want to tag this as a boundary then open a topic in the US category on the OSM Community forum https://community.openstreetmap.org/c/communities/us/78 and make your case.

https://www.openstreetmap.org/changeset/165401791