Because most of the Chinese people keep silent when being crushed by the government; moreover, a small group making noise will be brought to the government by the majority (kind of like when a monkey has to be killed, others will push one out).
Look at what happens in France; in China, it is a piece of cake: Xi can easily raise the retirement age --- with a close to 100% vote!
This is why the Chinese history just repeats, drastic and violent changes occur only when the majority cannot endure anymore.
到了大部分人都不能忍受的时候，就是改朝换代血雨腥风的时候了。
中国几千年的历史就是这样的重复，唯一跳出这个循环的是台湾，也只有台湾才能帮助大陆跳出这个循环，大陆人自己是不可能的。