Maybe voodoo is more familiar with the Western culture? But 'santet' does not need a doll or something similar. It can be send just through the 'wind' with some requirements such as strands of hair, clippings of nails, and a picture of someone you want to send this 'santet' to.
P/S: You will understand it better if you watch Indonesian horror movies :)
I said nothing about voodoo. Cast is a generic term in english, meaning to throw, literally, but it is used all the time with magic. I guess cast doesn't mean it has to be directed at a specific individual either. Trust me, cast is the word used with magic in English, not "send". Harry Potter/Gandalf/any wizard person doesn't "Send" spells. They cast them. Promise.