IMHO, I believe that bass players are generally easier going and have passive/less egotistical/beta personalities compared to some other musicians in the band that have 2 extra strings.
However, just because we may lack a force of personalities/control freakery, I don't feel we should automatically play second fiddle musically and accept a minor 'supporting role'.
I can play my instrument (and theirs) just as good as them, if not better. Be more confident. It's a great instrument. People really appreciate great bass playing. As Keith Richards said " Anyone can Rock but can they Roll"