Thanks for your comment - why do you think the connection is not meant to be used (by pedestrians and cyclists)? There is a break in the barrier, paved surface and a pedestrian crossing across Rue des Carolingiens next to it.  It's true there are other connections, but if you plan a route from/to the buildings on the other side of the street, the fact that the connection is not represented in OSM results in a planners returning a suboptimal route.