It lacks the ability to self correct and do all the adjacent tasks like client comms etc. So if I come back to it in the afternoon I may have wasted a day in business terms, because I will need to try again tomorrow. What do I tell the client, sorry the LLM failed the simple task so we will have to try again tomorrow? Worse, lie and say sorry this 2 hour task could not be achieved by our developers today. Either way we look incompetent (because realistically, we were not competent, relying on a tool that fails frequently)

I'm sorry but I'm not familiar with the context you mention, have not worked in a job where I had to communicate with clients and I find it hard to imagine a job where a junior would have to communicate with a client on a 2 hour task. Why would you want a junior to be the public face of your company?