I like crypto but the way I read this is that it's a good number of the reasons that the existing financial infrastructure is better (particularly once the US infrastructure updates to things like instant FedNow payments).

I think defaulting to using a mixer would be inconvenient and it could get folks flagged for even using it at all.

Also, what ever happened to not re-using addresses? I know it doesn't make it totally private, but I thought it helps some, since you'd still have to tie addresses to identities somewhere in the chain.