It is a problem, because if theoretically Musk were to trademark that character (improbable), Unicode would likely be forced to remove that character and break

It is a problem, because if theoretically Musk were to trademark that character (improbable), Unicode would likely be forced to remove that character and break every instance of it across the internet. Not to mention that anybody using that symbol, which already has an established meaning in mathematics, would be infringing on that trademark.