Okay. I wasn't expecting such low popularity of this idea. I mean, the view count is adequate, but there isn't anybody who wants to debate.
Fine. I'll take the stand and give the first pro argument.
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It is common knowledge that Spartans were the sons and daughters of Heracles. However, Heracles was a mythological figure. Since he never existed, Spartans must be the sons and daughters of _________. Since this _________ can be filled with any name, and all of us are either the sons or daughters of somebody, we must be Spartans. Therefore, this must be Sparta.
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This is what an argument should be like. Use factual information, then interpret it in an unusual way, and then base your argument on that interpretation of the facts.