Wow! What a lot of issues, and really impossible to have an opinion, as you say, I am sure it is all far more complex than it may appear. What I wanted to say is this; from the sort of bow and arrows you describe, it sounds like he may be doing archery, in which case, he will be taught how to care for the equipment, and the potential dangers. I would not be worried from that viewpoint. Also, you say he does not even know about robots. Is he by any chance, studying at a Waldorf School. In these institutions, modern technology is not allowed at an early age, and is introduced slowly and much later than most children see it. From what I remember of the system, television is also frowned upon. Also archery is one of the things that many children are taught at these schools.