Humanity has to change so change happens to it, as change happens in everything else, too. The Old is done away with and the New, more conscious, more developed, emerges.
When karma is sped up, change for humanity can be a bit bumpy when people are on the wrong timeline. Fine, when people are on the right timeline. (There are plenty of posts on this site about timelines and about using intuition to get on the best timeline for anyone who wants to know.)