But yeah, let's leave the real world behind. Why can't you knuckleheads just accept that some of us want to bring a positive change? A fantasy setting is not bound to the rules of historical medieval Europe. We have mages and dragons but equality and democracy? No that's just unrealistic...
That right there is why equality and democracy couldn't happen in Thedas, how do envision a lower class revolution for equality ending in a world where a group of mages whether working for the nobility or being the nobility can do this:

Revolting peasants, meet demon army, i think the winner is obvious.
I think any civil revolution is destined for failure as long as there are magic/dragons and of course Darkspawn, if you have any workable realistic solutions that would work in a setting with magic and dragons and Darkspawn i would like to hear them.
P.S
Guns at the time of the french revolution were highly inferior to thedasian magic so we had a much easier time, just before anyone brings that up.