No, it doesn't work like that. You can't make driver X in the kernel GPL without making the whole kernel code GPL.
> You are trying to decide for those "few" people that they are better off without working drivers. Maybe some people do like having working graphic cards or working sound.
Aside from the fact that sound works better in FreeBSD compared to Linux (because of OSS4) and that graphics is at least on par with Linux (or better; the proprietary FreeBSD driver continues to work without recompiling the kernel shim every time the kernel is updated), you are completely missing the point. Some guy who complains on the Internet that FreeBSD doesn't work on his laptop is of no value to FreeBSD. Valuable users are those who contribute code, those who run large installations, and those who use the code to build their products. These always take priority and every decision happens with them in mind, not random dudes on the Internet. You're complaining about sound and graphics? I'm having a hard time believing this is a serious discussion, why not complain about the lack of sound and graphics on a PIC32 microcontroller.
> FreeBSD has a linux compatibility layer, which mean they can often run said GPL drivers through its port system.
No, this is impossible. Linuxemu is a compatibility layer for Linux user-mode binaries. It emulates the Linux system call interface. It cannot be used with Linux drivers. As mentioned above, the driver model is very different between different operating systems.