Computers can't generate random numbers without external help. Dice and coins might be one source of entropy, but they aren't the only one. Cameras are a good source of entropy too. Hardware wallets are great and will remain important. I remember early full-disk encryption software that forced the users to move their mouse for a minute or two and type a lot on their keyboard (to generate additional entropy). Most of our products don't do stuff like this right now. They should.