The first time, sure, it saves compute. The second time you ask, I feel like it should be the time to go into thinking/verification mode. But who are you? Are you paying? Does the answer being correct generate ad dollars? No? Then your usage mode isn't even being optimized for in their A/B test, probably.

In fact, if hallucinating the wrong answer hooks you into doing even more searches or into buying something useless, it would be preferred!