If you use JOSM for editing OSM you can see a lot more datasets than those shown on OpenStreetMap.org, i.e. "seamark:", etc. Why is there no option to show these datasets on OpenStreetMap.org (something like a button "Show seamarks")?

If you use JOSM for editing OSM you can see a lot more datasets than those shown on OpenStreetMap.org, i.e. "seamark:", etc. Why is there no option to show these datasets on OpenStreetMap.org (something like a button "Show seamarks")?