That's a use case.
Certainly, no one here is arguing that there are things openai refuses to allow, and given that the effectiveness of using GPT4 on them is literally zero, a sweet potato connected to a spring and keyboard will "beat" GPT-4, if that's your scoring metric.
If you want a meaningful comparison you need tasks that both tools are capable of doing, and then see how effective they are.
Claiming that mistral medium beats it is like me claiming the RenderMan beats DALLE2 at rendering 3d models; yes, technically they both generate images, but since it's not possible to use DALLE2 to render a 3d model, it's not really a meaningful comparison is it?