It is already done by some platforms (for example ChatGPT generates a prompt based on your query when generating images). The downside is that you might lose i

It is already done by some platforms (for example ChatGPT generates a prompt based on your query when generating images). The downside is that you might lose information (the improved prompt might not be an exact semantic match with the original prompt), plus it becomes less and less useful as model's ability to understand commands improve. Basically, if you express yourself clearly, betting on model improvement is enough, there is no need to add a faillible extra-step.