It is fun to occasionally empty the magazine at running coyotes. In some areas we hunt we may run into pigs, also.
Even if these things seldom happen, it is nice to have enough ammo to entertain the possibility.
In case of an emergency it would be nice to have enough ammo to signal for help, and possibly repeat, if necessary.
I had a great uncle who made a big show of leaving hunting camp each morning in the Adirondacks in the 1940's with just one round of ammo. And he did have successful, one-shot kills several years in a row.
Then one year he shot at the biggest buck he had ever attempted a shot at. He wounded it and had plenty of time for a follow-up shot, but he had none with him. The buck ran off and he never found it. He felt real bad about the experience. That deflated his ego and cured him.
From then on he carried a few more rounds with him when he left camp. I still have his octogon-barrel Savage 99 in 30-30 Winchester that was made in 1913, and it is still a good shooter.
