There are fundamental reasons public transit is always more efficient than private cars. There's no fundamental reason a really good search engine is more efficient than an LLM or any other kind of AI.
Anyways these sorts of comparisons make no sense to begin with, and quite obviously at the moment the worst actors cough xAI cough who are deploying massively polluting generators into residential neighborhoods are much worse than, say, Google Search
Imagine a hypothetical search competition and you are given Google and I am given ChatGPT. I’ll win every single time.