In a society without hierarchies, an anarchist society, you still have groups and communication and working together, you just don't have people above you telling you something is OK or how it should be.
Absolutely no form of government or system (anarchist 1000% included) will solve the problem of people being selfish or bad, all that anarchists contend (that I have seen) is that when there isn't those built hierarchies bad/selfish people don't amass power so everyone else can actually handle them on equal terms.
And considering how Epstein was able to morph the whole political landscape to defend himself for over a decade, uh, any alternative can seem pretty reasonable.