YES, there absolutely is. The more open minded you are, the better - I remember when I first started playing drums I shunned jazz because I thought it was just hours of going 'ding ding da-ding ding da-ding ding da-ding ding" on the ride cymbal and nothing more to it (and didn't like it as a music style outside of drums either). Then I truely investigated it and realised how horribly wrong my assumption was; that was years ago, now I love jazz and basically every style of music except the top 40 crap you hear in the charts.
Not only will you discover a whole new world of music which you'll love as a listener and a drummer, but learning all the different styles will give you better chops (think metal, gospel.etc), independence (latin) and creativity (jazz) (+every other genre of music for all of them). Funk music is heavily influenced by jazz as well.
Fundamentally, learning different styles will increase your technical ability and creativity and you'll be a better drummer; influences from other genres will creep their way into your drumming.
You say you only like funk and rock now, but give it some time and I reckon you'll realise you like all the other genres too