Are there any downsides to that approach? It seems like we're moving towards empowering llm's to interact with stuff as if that's better than us doing it for th

Are there any downsides to that approach? It seems like we're moving towards empowering llm's to interact with stuff as if that's better than us doing it for them - is it really? Eg say I want to build an agent to make decisions, shall I write some code to insert the data that informs the decision into the prompt, return structured data, and then write code to implement the decision? Or should I empower the llm do those things with function calls?