That's the point I like to make to our young, rising generation of indoctrinated twits. The Spanish Conquest was a liberation for the Indians and, even though they ended up switching masters, an enormous net gain. The catastrophe for the Indians was the disease wave, which killed 90 percent of them. The anti-historical radicals conflate the two.
I wouldn't go that far. By some estimates as much as 80% of the population died of disease.