> Why do I need to rebuild without Bluetooth support?

Have you tried Bluetooth on FreeBSD? It's an unstable mess which does not support any newer device. Bluetooth always worked for me out-of-the box on any reasonable Linux-based OS. FreeBSD was like 20 years old memories of Linux Wi-Fi Cards. Remember 'ndiswrapper'? That's how bad Bluetooth on FreeBSD is. So the author probably assumes that Bluetooth is a piece of shite everywhere and want even Linux programs without a support or so.