The question that comes to my mind....
Has there ever been an accident, or serious incident, where the lack of appropriate charts was a casual factor?
Even if you get lost, there's lots of ways to get help.Hell, even with charts you can get lost.
Even if you're IFR and have to divert to an unplanned airport, there's ways to get help and approach information.
Does the "depth" of the requirement fix a problem?