I don't see where the OS's RNG functions are being deprived of such entropy as the hardware RNG provides; it looks more like the hw RNG is being used as one of

I don't see where the OS's RNG functions are being deprived of such entropy as the hardware RNG provides; it looks more like the hw RNG is being used as one of many inputs to the OS RNG instead of as a completely trusted substitute for the OS RNG.