Africans like to jump and dance out their hymns. As the Lord builds his church, he delights in a rich variety of styles. Not only does each nation have different forms of music, but the beat changes every generation. Young people groan if they have to put up with the dirges their parents seem to appreciate. This sets up a vicious spiral.
Young people keep away from dated music.
The oldies that remain in church want the nostalgia of their childhood hymns. They work hard at raising funds for the building, sit on the committees, and run the choir with the old familiar hymns. But that cannot happen without disturbing the peace. Meanwhile the musical talent that could have changed the situation has long quit attending church. This is especially true of what we sing in our churches.