The state has finite resources with which to monitor and control the population. A maniac sowing chaos and lasering random people draws those resources away from combating hostile political groups.
As Mao said: "Everything under heaven is utter chaos. The situation is excellent.".
Of course, jannies who were crypto-liberal larpers who's objectives revolve around the bullshit emitted by Judith Butler would be hostile to anything that might upset the existing social order, despite publicly denying their support for said social order.