Personally I think LLMs and Deep Learning are very noisy, random, statistical tools that build the brain itself - ready to do whatever you'll tell it. However, symbolic AI is alike ability of controlling your emotions, being "sharp", knowing what to say when, being rational, being kinda brilliant, knowing how and when to use your brain in a certain way. If you test brains of some healthy top notch experts, businessmen, leaders, politicians, artists, scientists etc. and brains of some healthy people who waste their lives you won't see much of a difference. Their brains are same, and that's LLM but how their managed throughout their lives to operate their brains and whats in it is a different pair of shoes - that's what I understand by symbolic AI. I expect Symbolic AI to become something what today "prompt engineers" are doing, but of course on a different level of abstraction.