You gotta admit, although this guy has no idea what he's doing, he's actually doing better than I'd expect with that.
I'm with you, Morphy. I'm sure it breaks your heart to even see the "survival bows", which sometimes shoot arrows so poorly that they would be better thrown. They're not just annoying. I think the actual issue with these survival channels is that they give the wrong impression, that all you have to do is learn to make it.
I get annoyed with academics on the capabilities with the sling, but it's sometimes hard to blame them. I think one study (
https://www.sciencedirect.com/science/article/pii/S030544030900034X , hopefully the article is accessible) tried to measure distances based off of native Andean slingers, which on the surface might sound like a good idea. However, they might not be able to tell the quality of the slingers and if the slinging culture is still capable. The longest distance by an adult male was 130 meters. In fact, the guy who did that was one of two adult males (Out of 7) who broke the 100 meter mark, the other guy who broke it had a high range of 101.54 meters. A couple guys didn't even break 80 meters. Now, I'm no Luis, but I'm pretty sure myself and many people on this forum could probably go toe to toe (and probably exceed) the best guy they found.
This David Jackson from EXARC is clearly taking an academic perspective on it, and he's more of the hands-on academic that forgets to dedicate several years of practice into their methods and materials. I almost feel bad for the guy, because he probably doesn't understand how poorly he's doing. It should be pointed out that his results would not be too strange if they were included among the Andean slingers, which might go to show the state that slinging in the Andes has declined to.