Strong disagree, (some of) those things are all still necessary to prevent me from coming to your house and hitting you with a wrench until you give me your pri

Strong disagree, (some of) those things are all still necessary to prevent me from coming to your house and hitting you with a wrench until you give me your private key; to prevent me from taking payment and then ghosting you; and innumerable other financial system problems we solve with our current system.