Because it actually existed? Here on earth, in reality, the same one Paul wrote to, the Apostles established?
Or are you resting on the position that the Church in the NT disappeared after Acts? Or that history ceased? Please explain...
{{{CRICKETS}}}
The Catholic Church and the Mormons love to gloat about their genealogy and history. They somehow hope that earthly ties give them credence. They praise and venerate their earthly “church fathers” and build grand edifices and monuments in honor of them. The focus on the fleshly history and attachments its telling.
Romans 8:9 But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of his.