Much Christian (or "religious") music tends to exist as an alternative. Does that make sense?
In other words, it's not really there to be the cutting edge of musical innovation, but almost as a knock-off without the secular lyrics.
I feel guilty sometimes that I don't dig Christian music a bit more. I did get into Petra at one time in life, and I still listen to some of their stuff now. But a lot of it is just bland to the nth degree, and seems to run low on creativity. And many of the lyrics are just buzz phrases like "lift your name on high".... how do you lift something "on high"? Yet "on high" is a catchy phrase in contemporary Christian music. Sometimes I feel like these artists are just mimicking each other.
But with all that said - more power to anyone who truly enjoys Christian music, and perhaps they're better for it.
For me, I'd rather listen to old timey church hymns, which I can find soothing at times.