Its has been done before, sometimes it got out of control.
Yellow Turban Rebellion
White Lotus Sect
Taiping Rebellion
There are free religious freedom around China in the ancient China. It is why Islam can be spread there while in ancient European region only Christian can live there.
Rebellion is something different, they are eliminated because of their rebellion act, not because of their belief system and rituals.
East civilization that include Islamic kingdom, ancient China, Hindu/Budhist/Islam of Indonesia and others are usually practice freedom of religion since ancient period.
While religious restriction happening in China after CCP rule is more inherited from Communism that generally hate religion and see them as opium of the society. It is why Chinese who are under 18 are prohibited to practice religion. It is the measure to curb the spread of religion and has anti religion agenda. Nothing to do with ancient Chinese wisdom.
Religion is not a big issue in China anyway, polibiro is just like 上书房, it's just a different name.
It will be a big issue if they become big and challenge CCP just like what happen with Fallon Gong. Even Fallun Gong is first curbed not due to rebellion, but because its widespread follower. The opposition comes after they are suppressed by CCP
Please dont use China character to explain things in this forum to avoid further debate from non Chinese people.
Many great ideas and sytem always have roots from ancient period, it is also why parliamentary and democratic system practices are also found in ancient Indonesia, pre Islam and after Islam period in Arab world beside ancient Greek. In Afghan for example they have lorya jirga. Same thing also true for Communism that comes from Marx idea that have been practiced in ancient Jew tribes, but unlike communism under Marx theory who is also a Jew, such ancient practice was done by a highly religious Jews community.
Despite so, it still should be admitted that current Western world have big influenced on democratization process around the world in the modern world. Marx and USSR also have huge influence on the spread of communism around the world. I believe when Mao adopted single party system with has politbiro and other stuff in it, he directly adopt it from USSR regardless whether ancient China under kingdom ever used it, some thing that I highly doubt.