It does explain how you would have people living side by side, if you look at how people tend to work.
Take cigarettes for instance. We know they’re unhealthy. There are also still millions (hundreds?) smoking them every day.
People give up and fall into habits unless there is strong reinforcement. If you get a parasite and have no way to get rid of it (because of lack of modern medicine) because you ate pork, not like you’re going to stop eating pork necessarily any more. Especially if it’s cheap in your area.
If there is another group of people who manages to not have those issues because they don’t eat pork - they’re going to keep not eating it after seeing that too!
Take cigarettes for instance. We know they’re unhealthy. There are also still millions (hundreds?) smoking them every day.
People give up and fall into habits unless there is strong reinforcement. If you get a parasite and have no way to get rid of it (because of lack of modern medicine) because you ate pork, not like you’re going to stop eating pork necessarily any more. Especially if it’s cheap in your area.
If there is another group of people who manages to not have those issues because they don’t eat pork - they’re going to keep not eating it after seeing that too!