Siri is a toy, but I don't think that was Apple's intent. It's been a long-standing complaint that using Siri to search the web sucks compared to other companies offerings.
Having Siri answer your trivia question about whale songs, or suggest a Pad Thai recipe modification when you ran out of soy sauce, is just not where they see the value. Poor web search has been an easy critique to weigh against Siri for the last many years, and the ChatGPT integration (and Apple's own local prompt prep) should fare far better than that, but it doesn't have any relevance to "leapfrogging" because the two companies just aren't trying to do the same thing.
And it's not just web search! Siri's context is abysmal. My dad routinely has to correct the spelling of his own name. It's a common name, there are multiple spellings, but it's his phone!