Not so much an urban legend as much more a joke that spread too much among beginners. In itself it's just self-deprecating humour among programmer. We're all aware that we have to rely on online help a lot, so it makes sense to joke about it.
In itself, this might even be a good thing: Experienced developers continuously joking about how much we all rely on looking things up sends a strong signal to beginners that this isn't a bad thing. As much as I hate the joke for how over-used it is, the message it sends, although very hyperbolic, isn't a bad one: "None of us really has a clue, so don't worry if you need to look something up".
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Not so much an urban legend as much more a joke that spread too much among beginners. In itself it's just self-deprecating humour among programmer. We're all aware that we have to rely on online help a lot, so it makes sense to joke about it.
In itself, this might even be a good thing: Experienced developers continuously joking about how much we all rely on looking things up sends a strong signal to beginners that this isn't a bad thing. As much as I hate the joke for how over-used it is, the message it sends, although very hyperbolic, isn't a bad one: "None of us really has a clue, so don't worry if you need to look something up".