Yeah, agree with the above... Way over generalized opinion. Jazz is far from "easy" to play WELL, same with metal, or fusion or whatever. As a drummer, there are things on both sides of the spectrum I find extremely challenging. Just depends and the artist and the band, and frankly what suits the particular piece. Lot's of metal drummers study Jazz drumming to a degree as it gives them facilities otherwise not learned that are very useful in practical playing. I'm not a Jazz drummer, but most of my skill building work comes directly form some of the Jazz greats. I use it all the time.