If you read it. It isn’t saying corporations/business are people. It is saying they are owned by people and people have rights that cannot be violated.
People have rights and a business inherits the rights of the people who work within and own it. Just think about what it would mean otherwise. A bank or hospital holds countless private information of anyone who uses them. Any business does, as they all hold private information of clients and employees. That information by extension has a right to certain things like privacy. The government or others cannot just force their way in when they want to get information they want.
That isn’t because businesses are people. Its because businesses are created and owned by people. That’s all that law is saying and it gets twisted every time.