Leaving aside the specific example given, it's been eye-opening for me since the advent of isolated tracks from albums of the 70's/80's, how often the bass kinda sounds like crap, sometimes sloppy playing, fret noise, clumsy punch-ins, etc. But then when I go back and listen to the full mix it does the job just fine. I think, in rock & roll particularly, those imperfections contribute to the swagger. I recall reading Elvis Costello's recollections about recording his first album, which was done very quickly and cheaply (six four-hour sessions, in an 8-track studio, for a cost of about £2,000) but spawned multiple hits. The producer, Nick Lowe, would say to the band "just bash it down and we'll tart it up in the mix." In other words, he was more interested in the energy (and economy) than the perfection.