When you listen back, you're not doing it for pleasure
It allows you to concentrate on the sound produced (which is what you're aiming at improving) without getting distracted by the physical issues of playing the bass and the mental concentration on hitting the right notes at the right time
Critique what you hear, to pick out what sounds good and also to spot inconsistencies (eg. if you spot timing glitches when you shift positions or intonation errors when using a particular fingering) that can then be improved with specific exercises.
Wulf