People are fine with it because 1) they benefit from it and 2) have no empathy or 3) are ignorant of the realities. Equality sounds good on paper when you ignore history.

"Everyone has the same opportunity" can be technically true but still practically false. e.g., If you want to disagree with me, you can, but you have to reply 1 minute after I post this comment. But a reply any time other than exactly 1 minute after supports me.

Everyone has the same opportunity here: to express their support or disagreement.