Whilst maybe GPT-4 will change this, I think it is important to remember that these general ChatBots are not the way we have generally trained LLMs to write the best code. In fact, coding is one of the few areas where training specifically just using source code and maybe some stack overflow (not all natural language on the internet) leads to better results on the previous iteration of LLMs (GPT-3 wave). So the real test will be whether the GPT-4 wave of specific coding LLMs i.e GPT-4-Codex can 'actually write code' see:
AlphaCode Codex CodeGen