Dear reedone816,
your observation is one point of discussion among different Muslim groups in Indonesia until today. We have to acknowledge that the earliest layer of Islam in Indonesia in the 15. - 16. century was built by Sufi Muslim teachers. They used movement and music arts of different kind to spread this Religion. For them, these arts were modalities of "dakwa", that helped to grow the then new Religion there.
Therefore, what may be a 'sin' for the one is a medium of believe to the other.
Salam, Uwe