Reminds me of one of the Crockett stories! He said he charged in on a bear he had wounded, armed with knife and hawk! The bear stood up and looked at him. Suddenly he realized what he was doing and "backed up real quick, reloaded and shot the bear dead!"
I have viewed many of the origional knives of the long hunters and frontiersmen and most are not excessively large or heavy in blade. Crockett carried a double edged knife with blade about 6", Boone carried a knife slightly larger, an English knife, taken from a dead Shawnee, blade about 8-10" and not excessively thick. George Rogers Clark carried a simple knife with a stout blade about 8" long. The knife issued to Roger's Rangers was a butcher blade, 12" overall length. The dime novels didn't popularize the big blades of Bowie fame until the Alamo fiasco in 1836. That was at the end of the fur trade, which was dominated by the butcher knife, ordered for the companies by the hundred gross, often without handles. Blades 6-8 in. long. "Up to Green River" was only a six inch cut.
The knife makers guild promotes the continued life of the big bowie blades with an entry test that requires a bowie type blade; hacking a 2x4 in half, cuting a free hanging rope, penetrating 1/2 in. plywood, etc. Most guild members make them to gain entry, and then on order as "art knives", not intended for use in the real world. Real world knives have blades 4 inches long and 1/8 in. thick.
One can reach the vital organs and arteries of man or beast with a blade of 6-8 inches. More blade length is useless excess, more weight to carry that requires heavy jewelry on the pomel for balence. Some folks can carry it, I can't. I carry a small hawk for the rough work. It is lighter, carries better and was made with hacking as its purpose. I just can't move a heavy blade quickly.
Knives are for cutting, smooth, deep and often.