God authorized instrumental worship throughout the Old Testament. Then, without a shred of scripture he de-authorized it. Even though God never changes, He changed! Instruments are mentioned in revelation, but that’s not the New Testament.
You are more than welcome to use and enjoy music as long as you’re not doing that to the glory of God LOL!
This has more to do with issues on the Civil War then anything else. In fact, the church of Christ was just as against full-time paid Ministers as they were the instrument originally. Ironically, that teaching fell away.