Because a trademark is a brand, a facade, and a sign of your service or product.
Join and identify your brand, and judge whether it is your brand. It's a trademark, so it needs to be registered.
Of course, companies also need to register. Only when a registered company has a corresponding business license can it carry out relevant market operations. Company and trademark are two different concepts, and they are two essential elements of a formal enterprise. For example, Huawei, its trademark is
The company name is Huawei Technologies Co., Ltd. ..