So it's a good praise song, as opposed to a dismally bad praise song. There's plenty of musically "complex" religious music sung by ordinary people, such as the "village carols" sung in pubs round Sheffield. Lots of Gospel music is complicated enough. Sacred Harp, West Gallery, Latin American...

I suppose it wopild me posible to define "praise songs" in a way that requires that it has to be be very very simple and uninspiring, but I don't think that would be a useful or valid definition.