You assume that musical genre, qua rock 'n roll, is by itself sinful and worldly. This is a dangerous assumption to make, since most Christian music and hymnody throughout history utilized music taken directly from the current culture.
The important thing is that the LYRICS glorify God. There is no such thing as a "sinful musical genre."
I would rather hear a song that has doctrinally-correct, God-glorifying lyrics in the rock 'n roll genre than heretical lyrics in a traditional music format.
The problem is that the LYRICS OF MODERN SONGS AREN'T SOUND.
Drums aren't sinful. But pandering and failing to produce God-centered lyrics IS!