I all ways like your post, understandable and to the point. I think what has made it so confusing for many is most gun writers spit out a number but do not state what game their are referring to. This makes some deer hunters thing they need a grizzly bear cartridge or an moose hunter think he is fine with a varmint/deer cartridge. Not that it can't be done, just not the best choses.
Keep in mind that a lot of "gun writers" really don't have a lot of field time behind their articles, they tend to give you target and ballistic data but very rarely are they guys who have put dozens of game animals on the ground every year for decades and kept good records on such things as terminal performance, point and angle of impact or all of those other variables that have to come together for a clean, quick, humane, one shot kill with minimal excess meat loss.
Honestly a lot of them are semi retired and writing their articles so that the companies they are reviewing will in essence sponsor them with freebies or very reduced prices on their products.
While I look to the guys with the education and experience on technical questions I tend to give much greater deference to the professionals with decades and hundreds of dead animals to their credit who don't sound like salesmen.