Because it's tiny and gives hardware acceleration to a function 100% of users need.
My uptime, on the machine I'm posting from, is nearing a year, and this module has never been loaded. So, no, 100% of users apparently don't need this, at all.
If I would violate an Apple license, I bet they'd come after me in court. I wonder if they're pursing this surgeon, right now (somehow, I don't think so).