I understand that, but in tennis terms, the sexes aren't equal. That's not bias. It's a fact.
I know why they've gotten rid of the difference, and in truth, it was probably the right move in political terms, but simply saying there's no inequality between the sexes doesn't make it so. It might be aspirational, and the prize money may be a statement that they value women's tennis as highly as men's, but women are being disproportionately rewarded for what they're bringing to the game as a whole, IMHO. It can be argued that that might given the women's game a boost, and promote higher standards, but it hasn't done so so far.