After listening to all the bass only tracks on TB recently I'm starting to think that I'm very uptight about fret buzz. I can't stand it, and will monkey around with a bass for hours until I get it set up to play easy with no buzz. But the pros just seem to let it all hang out. Pick noise, fret buzz, they don't seem to care a whit.
The "pros" play through pro compressors, PA's and studio pre amps. Many of these recordings are raw signal going to boards. That said, I can't see how any producer would let the piss poor crap in the example above ever grace their board. That has to be one of the most horrible ISO tracks I've ever heard.