Unstated Gospel symbolism: It's too easy!

What do I mean by saying that it's too easy to come up with theories of unstated symbolism in the details of the Gospels? And why does the fact that it's too easy create a problem for those theories?A song from an operetta by Gilbert and Sullivan says, "If everybody's somebody, then no one's anybody." If you're willing to go far enough to come up with an unstated symbolism theory for the details of the Gospels (such as the view that John is symbolizing some particular theological idea by dyschronologically moving the Temple cleansing), then there is virtually no limit to the additional theories you can come up with. The choice among them is arbitrary. And that's a Gilbert and Sullivan problem.Thumbnail by Studio Ellis & Walery:[1] Alfred Ellis (1854-1930)[2] & Walery (Stanislas Julian, Count Ostrorog, either senior (1830 - 1890) or junior (1863 - 1935).)[3] - Scanned from the 1914 edition of François Cellier & Cunningham Bridgeman's Gilbert and Sullivan and Their Operas., Public Domain, https://commons.wikimedia.org/w/index.php?curid=3987877