You provided yet another guide. There are KE guides/recommendations for rifles, pistols, archery, etc., for X games at X distance ... all are guides. What one does with them is entirely up to the end-user.I've killed stacks of deer, pigs, and one elk with a mere ~65 foot-pounds of kinetic energy at the "muzzle" of my bow so there's more to the KE and mode of delivery than just numbers or this wouldn't be possible. Virtually all were complete pass thru with a mechanical broad head.
I've had guides rattle off the "you need 1,500 ft/lbs to kill an elk" like they just got back from Bass Pro. A typical .44 mag has about 950 ft/lb at the muzzle so it shouldn't be able to kill an elk at point blank range much less a bear according to the numbers. There's more to consider than a hard number threshold and plenty of room for discussion and opinions, and still lots to learn.
https://www.realtree.com/kinetic-energy-and-momentum-calculatorView attachment 281599
The one thing your link iterated is to find the sweet spot between kinetic energy and momentum. There is always a compromise with one of the factors involved, just as I noted in #5, the best compromise between velocity and accuracy.
I agree with your statement, "There's more to consider than a hard number threshold and plenty of room for discussion and opinions, and still lots to learn. I am a continuous learner and do not have problems learning new things.