> used LLMs primarily to rapidly produce code for domains that I don't have deep experience in

You’re either trusting the LLM or you still have to pay the cost of getting the experience you don’t have. So in either case you’re not going too much faster - the formers cost not being apparent until it’s much more expensive later on.

Edit: assuming you don’t struggle with typing speed, basic syntax, APIs etc. These are not significant cost reductions for experts, though they are for juniors.