Public URLs Expose Read Access
A public URL lets other people view a Collection. It can be unrestricted or restricted, and it can act as a public web presence for that Collection. Write capability is not included just because the public URL exists.
Public URL is not write access
Write access belongs to approved collaboration or invitation records. A public URL by itself is not an editing permission.
Enable, Disable, Restrict, And Request Access
Public URL settings belong to the public Collection, not the account-wide private settings. Administrators can choose who can view and whether visitors may request read or write access.
People And Permissions Are Administrator-Controlled
Administrators can add users and manage access records for the public Collection. Public viewers can read according to the access mode, but admin-only controls remain unavailable unless the viewer is an administrator.