I get what you mean, and agree to some extent, but the reality is that handling cash is expensive and dangerous.

Back in the early 2000s, there was a large wave of high profile armours car robberies in Sweden.

Some even completely blew up the armoured car.

This lead to a debate and a deliberate effort to reduce the ammount of cash used in Sweden.

I remember reading something about 97% of all transactions inside Sweden are now done electronically.

This has lead to banks having offices that don't handle cash, and that banks are looking at cash deposits with suspicion, since you can't trace cash.

This, as usual, only really affects normal poeple, and criminals have ways around it.

In the US, it is legal tender to pay off all debts. But merchants can refuse to give you debt if you are paying cash. Thus have no obligation to accept it.