You keep saying male Revan was canon. Sure. But so was user-generated Revan, and neither is canon now.
As for things being de-canonized and re-canonized? Disney has done neither, to anything. That has been a purely Lucasfilms decision on every step. And no work that was removed from canon when Legends was shuffled off has ever been brought back. Legends material has been used as inspiration for a revised work, as is the case with Thrawn, but that isn't restoring a prior work. Regardless, that hasn't happened with Revan.
At absolutely no point did I say, "They should make Revan a black woman." That would also run into the problem of giving a user-generated character a specified sex and race. All I'm saying is I want them to make Revan neutral. Classic design already has the heavy robes, the mask. All it takes is they/them pronouns. Respects KotOR, SWtOR, and novel Revan.
You cite the demographics of the 70s. Alright. Let's look at 70s U.S. demographics. At the time, the U.S. was 83.5% non-hispanic white, which makes white men about 41% of the population at the time. Yet somehow, over the course of three movies, we got one person with a name from that remaining 16.5%, and the sum of all speaking time for women not named "Leia" across those three films is less than a minute. You can't pin it on demographics. There's a systemic problem at work, and no, ignoring it will not make it go away. We're talking about an industry that takes Avatar: The Last Airbender, a series with four nations explicitly based on three Asian nations and a Native American tribe, then casts all the good guys as white people and the bad guys as brown people. That makes the Lone Ranger movie, and for the most iconic Native American character in American pop culture, they cast Johnny Depp with a bird on his head. These are not exceptional cases. This is standard industry casting, and it's a problem both within the industry and in terms of the social ramifications of what goes on the screen.
If we ignore the problem, it will keep going on as is. Systemic problems get fixed by acknowledging them, by acting against them, by working to dismantle and correct the problematic elements.
Every Star Wars movie has had a political agenda. Hell, pretty much every movie has a political agenda. Art has a message. With movies, they tend to be about life, philosophy, or politics, usually all at once. The OT was about the Vietnam War appropriating WWII imagery to frame the Viet Cong as the French Resistance and the United States as Germany. Episode I was rooted in the 90s fear of growing Asian economic power, with the heroes fighting against an encroaching federation of ridiculous Chinese caricatures. Episodes II and III framed the US's response to the 9/11 attacks against the Reichstag bombing.
These are major political statements.
Now. You talk about people "quitting" being social justice warriors. Thing is, there's work to be done, change to be made. "Just stop fighting," won't end the problem. Without people stepping up and saying they want better than mere tokenism, that tokenism will go on. Progress takes effort. Takes those warriors fighting for social justice, same as has been the case throughout U.S. history.
Also, no. The First Order is not the evil white people. You've got Hux and Kylo, sure, but look in the background. Both sides are actually fairly diverse. And there are multiple heroic white people on team Resistance. Rey, Han, Luke, Leia, Holdo. Hell, Oscar Isaac probably ticks off Hispanic and white on the census, so he's both Latin representation and white guy protagonist. It's not like there's a shortage of heroic white people in this movie. So kvetching about more representation in the movie is a lot like... well...
https://i.imgur.com/wUgNEjC.jpg
