The thing is though, white cis guys have dominated business and politics in western countries for centuries. The few women who make it to the top are remembered because they were a rarity.
So yes, positive discrimination does mean that things get harder for white males. If you've taken 80% of the candy and and your three siblings got 20% and mom and dad decide to decide to re-divide the candy fairly then it does mean that one of the kids will have to give up a lot of their candy.