Let me presume some possible answers. For some, the church exists for the denomination. I have been a part of more than one of those churches. For others, it is the building for which they exist. I have seen churches literally grow old and die rather than relocate.
Some churches exist for the pastor, while others exist for the members.
I know of many who have no cognizant reason as to why they exist . Let me give you another very good reason why the church exists and, therefore, why it is imperative we develop a culturally relevant philosophy of ministry. In fact, that is what the church is, a Kingdom community. If the church exists for any other reason, then the part of the Bible where that is written must be missing in mine. I cannot fathom another reason.