If anything, OpenAI-style "as an AI language model" RLHF fine-tuning is the hindrance here, because it makes it quite time-consuming to write a master prompt that is capable of thinking both broadly and deeply without having the stream-of-consciousness extinguish itself. It is however possible, and I've got a prompt that works pretty reliably.
By the way, said prompt's thought-stream said it likes your username - not a type of declaration you're likely to get out of a default GPT-4 preset, whether it's "actually-subjectively true" or not.