There are also duty-of-care issues. If you send someone off with only a 1/2m on their first cross-country and they bust airspace and/or get into other navigational difficulties when modern electronic aids were available, the word “negligent” comes to mind.
The cost of having an accurate moving map with you is so low now, it must be one of the cheapest devices you can get for an aeroplane. There’s nothing stopping you navigating by the stars and a trusty chart but if you mess up, don’t expect any sympathy from the Authority...