because the widely quoted figure of 79 cents to a dollar is only if you blindly compare incomes without adjusting for hours, experience, education, or even role.
obviously a part time elementary school teacher with two years experience will make less than a full time investmenet banker that works 80 hours a week and has 10 years experience.
Once you adjust for all the relevant factors the effect completely disappears and there isnt a gap. (with some studies find maybe 1-2% within the margin of error).
so at the very least its very misleading to say they get paid less for the same role and same expereince.
if you want to go into why they may go into different fields or work less hours and how that reflects on society thats fine.
But its grossly misleading to take those nunmbers and blindly compare them and say its "sexism". Actually indian and asian woman make more than white men. So white men must systemically be oppressed. Or maybe they choose different jobs. (i still remember when google had to adjust their L4 software engineer pay to raise mens pay, because women actually made more!)