could you be more specific ? If the Openstreetmap is a description of things that are visible, like built roads, buildings and named places.. How are disputed

could you be more specific ? If the Openstreetmap is a description of things that are visible, like built roads, buildings and named places.. How are disputed borders stopping the useful building of a map? Doesn't the United Nations and many Federal governments, have conventions for showing and discussing borders in dispute? Why would disputed borders in some places, stop the (obviously) global project from continuing to map the real, physical place of Earth ?