Well, there are ways to read the text. Earth might mean all planets in the Hubble volume. Many mansions might refer to other planets with Christian societies. It's a lot of interpretation, but we can't possibly know without going out there and checking it out and then referring to the text again. If life is found, and I assume it will be, it will not bother anyone very much. In fact, it will be a hot topic around dinner tables for a couple days. That's about it. Old sermons will have to be slightly rewritten, which ought to be done more often anyway.
Right you are Mr. Whale. Reinterpretations will keep the business of religion as big and as profitable as ever!
-------------------------Robert Heinlein