You know there is, and you know what that reason is.
Fear.
Most, do not want to A) Go to jail, B) See everything they’ve worked for lost, and you can fill in the rest.
Fear will “keep the people in line” and he doesn’t even have a Death Star.
Please tell me how ten thousand police and troops would round up and arrest even one million armed demonstrators? No army or police force in history has solved that puzzle, but perhaps Dear Leader and his minions are smarter than all of them...