I think you are confusing privileges with "Privileged Class privileges" ie French Revolution which was a mess and was a failure - second we are a Republic, not a true democracy.
Driving is a privilege. Marriage is a privilege. You need a lic. for both.
1) my quote was from your article directly.
2) Which French Revolution are you talking about? 1832 (the one Les Misérables is about) or 1889, you know the one where they overthrew King Louis and created Democracy (admittedly it didn't stick the first time).
3) We are a Democratic Republic. Republic just means elected leaders, our specific form of Republic is a Democracy. China and Iran are also Republics. Civics 101.
4) A legal privilege is taken when one breaks the law. Discrimination is when you aren't allowed to do something because you don't fit in someone's nice little box.