It's just a matter of busses (Score 1)

I have three hard drivers, CD-recorder and DVD-recorder. Each of them has firmware. Nobody's complaining it's closed source. I do not understand why audio and/or video card driver can't be closed source - to me it's just like the above mentioned firmware, just the devices sit on a different bus - PCI and not IDE. Of cource, open source drivers are better, but why all the fuss if closed source firmware is silently accepted ?