@matante ‘s post is maybe a bit hyperbolic at the beginning, but I think it makes a valid point about bass guitar being an instrument that can achieve more widely-accepted sounds without benefit of massive tone shaping and dependence on signal path downstream.
Risking a little hyperbole of my own, a lot of people still want to hear electric guitars after they’ve been processed by signal paths that still cling to what guitar amps and speakers from the 1950s sounded like. Very few people really seek out the sound of unprocessed direct electric guitar; most agree that sounds unpleasant...and would agree that everything downstream of the guitar is by necessity “part of the instrument.”
Whereas the chances of achieving a useful, mix-supporting sound from relatively unprocessed direct electric bass are much higher.