Everyone has the same opportunity.
No they do not. You have to be phenomenally clueless or bigoted to think otherwise. The same opportunities are NOT available to everyone. That was the entire point of the civil rights movement and the suffrage movement. Just because you have some choices doesn't mean everyone else does. Opportunity can be taken away very easily by institutions (government and private) if we allow it to occur. Opportunity is a fragile thing and not everyone gets equal opportunity under the law or in society. Bigotry, racism, and sexism and discrimination are real things with real consequences. Those who have to actually face them by definition do not have equal opportunity. The fact that some people manage to break through does not mean that the gap in opportunity is not real for many many people.
For example, I become a developer; not a cake baker. That doesn't mean I didn't have equal opportunity to become a cake baker. It means that I fucking chose to be something else.
Wow do you not get it. If everything is so equal as you claim then why do we see non-white people incarcerated at disproportionate rates? Why do we see older people having trouble getting tech jobs even when they are well qualified for them? Why do we see a congress that doesn't even begin to resemble the demographics of the country? You think because you chose one job over another that there is no inequality in the real world? That's just ignorant as hell.