[pvaldes]

This rule was written in an age when rabies was a big problem. It has a lot of sense to avoid scavenger dogs and pigs in those places in the past. Now we have developed a solution to this problem but, as is included as part of a religion is a fossil rule that can't be changed. We have still many of this rules around.

Science welcomes change when we find a better way to do something. Is assumed that humans can be wrong and learn. Religion will fiercely oppose change because god can't be wrong by definition (and nobody has the authority to fix it). Ideology will oppose also changes that see as a menace, but can be more flexible.