According to Catholicism and Eastern Orthodoxy, why are the Asian Churches singled out in the book of Revelation?

In the beginning chapters of the book of Revelation, the Lord Jesus appears to the apostle John and tells him to write individually to the seven churches which are in Asia. The churches listed are Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia, and Laodicea. Since both Roman Catholicism and Eastern Orthodoxy claim to be the original Church, and taking note that Jesus speaks about **the** seven churches in Asia rather than seven **of** the churches in Asia, according to Roman Catholicism and Eastern Orthodoxy why are the Asian churches singled out?