They make too many mistakes for me to rely on their summaries for consulting. Repeating one of those is a great way to embarrass yourself in front of a client and damage your reputation

I don't trust LLMs or "deep research" for any serious analysis. I use them for guidance (when I do use them) but not for the final product. Too many words with too many landmines (mistakes) hidden within. Also, distillation and inference via human brain is much more environmentally-friendly than sacrificing fleets of GPUs while only being just a tad bit more work.