If you look at who is hired and admitted, that discrimination isn't accomplishing much!

Also, discrimination is about power; in its significant meaning, it requires power. If the owner of a tiny restuarant discriminates against you because you are a white male person, it is obnoxious but that is all the damage; you are safe, just go someplace else. If the government or the powerful majority discriminates against you, brutalizing you, arresting you, denying you work, etc. then it is very serious and damages your life and safety.

What changes - occasionally, in some places - is that white people and males no longer benefit from an affirmative action program that favors them - a ridiculous situation for the most powerful group in society. Look at sports as a simple example: Until the late 1940s, Major League Baseball only employed white players - it was a massive affirmative action program for white guys, who would not otherwise get the jobs. There was a great uproar, including among players, when they lost just a little of the privilege (the first year, in all of baseball, there were 1-2 non-white players. It took decades before the white guy affirmative action program disappeared.)