Policy of leaving us alone is likely. The reasons are also likely to be mundane. Too far away. We are possibly too far behind or we are so sufficiently behind t

Policy of leaving us alone is likely. The reasons are also likely to be mundane. Too far away. We are possibly too far behind or we are so sufficiently behind that bringing us up to speed won't help them or us. Besides, in our primitive ways maybe we have something they lack. Some aspect of diversity. A more interesting answer is they are simply horrified or disgusted: look up "They're made out of meat!"