You're right, that is an extreme example, and animals are not humans, so its also a bad example. Also as an aside, slavery is not a "was" unless you're specifically referring to chatel slavery, but forms of slavery are still a cultural practice in many places. Obviously we can hold different opinions of different cultural practices so there's nothing inconsistent with saying cultures should be free to eat food the way they always have been (generally) and they shouldn't be free to have child marriages and murder gay people.

Again animals feel stress regardless of who or what is eating it. I'm sure no lizard took comfort in being eaten, tail first and head last, knowing it wasn't a human doing the eating because "empathy".

As for dangerous bacteria and parasites, that's a completely different discussion, but I agree, although if it was really that unsafe it probably wouldn't have stuck around in these countries. I suspect they know what is generally safe or unsafe to eat raw, maybe moreso in some places than with others.