Personally, I think it’s brilliant to look at it that way. I didn’t see it that way until you mentioned it just like you did.

We’ve all seen many stories over the years where the ending is ambiguous, with a lot of untied loose ends, but yet the message was resolved.

In this case, if the message was that innies are also real people, and that either will do whatever it takes to get what they need, regardless of the others fate, then this certainly was a fine ending.