Bottom line for me, it seems that we have decided that Long bows -> Bolt Action rifles with medium power scopes used via spot and stalk hunting is the only universal accepted “ethical” method of hunting. Hounds, trapping, spears, darts, atalatals, bait, aiming assist rifles, slingshots, dear drives, blinds, elk calls, electronic calls, etc etc are all either too efficacious or not enough depending on where you live and how you like to hunt.

All of these are illegal methods in some US jurisdiction.
Even methods within the bow to rifle continuum, crossbow, pistol, air rifle, spurn a lot of IMHO warrant less “ethics” debates.
In my mind this is 100% ethical and very much in line with other hunting methods.
Now that being said, there are obvious and important regional restrictions on methods of take.
Adding new methods, that would decrease opportunities for others is a valid and important argument, as is the argument of over harvest.
My comments have not been, oh this guy is on to something, but rather as a singular event I don’t take issue with it, similar to my opinion on the guy who killed the bear with a spear in Canada. That dude was a tool, and I think spear hunting maybe shooting holes in the hunting boat, so it should be illegal, but that doesn’t mean in my mind it’s unethical.