I get where you're coming from, but you've already pointed out why utilitarian pain-minimising strategy is flawed - it always assumes rational actors and avoids its place in the larger surrounding system of desires. Hunters aren't perfect agents of solemn death, and animal attacks are also not guaranteed to be drawn-out gore baths where the deer is a powerless victim.

Since the entire affair is created to serve, and tainted by, the desire to make a profit, I don't think the argument can be resolved either way without first eliminating that.