I think it’s a trade off between depth and breadth. Thinking is hard and painful. But the insights achieved through deep thinking IMHO is worth because of the mental models that we develop. Not just how it compares now with an LLM generated content.
No doubt LLMs are excellent at researching, collating, structuring and summarizing information. Infact I think o3 Deep Research can probably save a weeks worth of survey time.
But in my experience a lot of thinking is still required to do something meaningful with it.