Even without anonymity, it raises the cost for the government to enforce broad restrictions, because the chokepoints—which are intermediaries like financial ins

Even without anonymity, it raises the cost for the government to enforce broad restrictions, because the chokepoints—which are intermediaries like financial institutions—are gone. In any case, anonymity is a gradient. It's a question of how much resources a state has to expend to track a user, and that value can be increased with better privacy technology, so that the state has to eschew broad-based restrictions on mutually voluntary interactions and focus its investigative resources on only the most dangerous actors, who engage in genuinely predatory behavior (murderers, thieves, etc).