Putting aside the fact that even with the new title a google search on the plausibility of the deluge myth is in my opinion as likely to show your question as with the other title, you have to consider that, yes we want to attract more people, but considering how touchy most aspects of Earth Sciences are to certain people (think about climate sciences, evolution, age and history of the earth, non-renewable resources, ... hell, even "shape" of the earth is somehow touchy for some people), we have reasons to be very careful as to what kind of people we want to attract here, and what kind a debate we want to start.
Additionally I think your original title invites more a debunking of the myth while the second one invites more a thought experiment. In the first case it would have been more on-topic on Skeptics while in the second case it is definitely well-suited for our site and even (judging by the answers you got) frankly interesting.