OK I agree

If any editor uses iD to avoid inconvenient at mapping that map seem clogging, please click "Map Data", then see "Map Features" section,  untick  
"Service Roads" or other kind of object you want to avoid the issue of inconvenient of mapping or worrying of distrubing other objects. 

If you use JOSM, you can download only certain type of objects via Overpass dialog, or use object filter.

https://wiki.openstreetmap.org/wiki/Overpass_API/Sparse_Editing

Incomplete map data coverage on OSM is common as there are too many vaild geographic features not mapped yet. Showing only driveways only and nothing else mapped is merely of incomplete data but not a mere reason to remove someone's vaild work as long as not violate the rule of OSM and existed in reality