Humans can be much smarter than any algo trading bots. The algorithms for trading are really primitive price action stuff - not fundamental information about the business, products, customers...
A LLM all by itself? No, I really don't think so. From my personal trading history - I knew to invest into AMD when it was at $5 because I tried their products and am intimately familiar with computers. LLM won't be able to do that for a long time. But - it helps me.