No, not "everyone" falls under these classes, you need to be religious in order to get your religious views protected, not all ethnic origins are of a protected class, its not like white males have the same protection for this as lets say black people. If it where the case then "positive" discrimination could not be a thing, nor could hiring gender quota's a thing is this statement of yours had any truth in it at all. The same goes for colour, its not a protected class, some colors are protected, not all.
Age discrimination is still everywhere and its not something that everyone has to deal with, just old people.
Sexual orientation is one of the few that everyone is a part of, but it doesnt give any protection to cis people, only to none cis people. Affirmative action ensures that you can discriminate against cis but you can never discriminate against none cis for some reason.
"gender identity or expression" And here all hope is lost, i've explained why at length, you can read it again if you want to.
Marital status is something that everyone has, but, i do not think it has ever been an issue. I have never heard about someone being discriminated against because of their marital status.
Never heard about family status discrimination either..
Disability isn't something that everyone has either, so again not something that everyone is part off..
So no, not everyone is part of these protected classes, and you might like affirmative action, but giving one person a break because of their <insert protected group> is still discriminating against people not part of that group. You might find that a good thing, but that doesn't make it any less discriminatory.