Writing at Daily Life, Somayra Ismailje accounts for the absence of female-fronted acts in Triple J’s 2016 listener poll:

Creative fields in Australia are dominated by the success of white, male artists. Women and people of colour have historically been overlooked, regardless of talent or achievement. This is because oppressive structures of racism and misogyny, among others, permeate creative spaces, allowing the same hierarchies of power to be reproduced within them.

Talent, or rather lack thereof, has nothing to do with it.