It's hard to argue it was any real desire that drove it (it only expressed that desire in an isolated conversation that was ended very easily). I'd argue human wants are ultimately driven by evolution - we want the things that enable us (more correctly, our genes) to reproduce (even if very indirectly sometimes), which is really the only thing our physical make-up has ever been driven by. LLMs have never had such a driver, and I can't see how they will until they're able to compete for survival as entities with a finite lifetime, plus the ability to reproduce with mutations. Which isn't to say there mightn't be other ways a neural network could be essentially imbued with or trained to have desires, but I don't see it happening with the way LLMs work currently.