Go play around with Conway's Game of Life if you think that things cannot just spontaneously appear out of simple processes. Just because we did not "design" these LLM's to have minds does not mean that we will not end up creating a sentient mind, and for you to claim otherwise is the height of arrogance.
It's Pascal's wager. If we make safeguards and there wasn't any reason then we just wasted a few years, no big deal. If we don't make safeguards and then AI gets out of our control, say goodbye to human civilization. Risk / reward here greatly falls on the side of having extremely tight controls on AI.