I must admit, I'm a little confused. Isn't what you're talking about called dueling?
Isn't eating, moving, and chasing all a part of Pking?
Doesn't everyone have the same type of food available, and the same amount of inventory spots to manage?
Let's look at the contrary as an example: Are you saying that standing still without eating or moving requires more skill?
Different stats (lower or higher than you're opponent), can have all sorts of positive and negative implications, but it does not mean without a little skill and the right build that you cannot kill someone 20+ CB lvls higher than you.
Likewise, if you bring 20 shark and I bring none, consider the fact that you now have 400 hp more than I. (Which is available to everyone) Additionally, how you eat and manage your inventory also impacts how much food or "hp" you will have available.
If you go into the wildy with no food, and full rune; expect to lose your full rune.