If a place doesn’t accept credit cards, I leave also. I just don’t carry cash anymore. To each their own.

They mostly do it for safety reasons. Being a target for being robbed for drug money just gets annoying after awhile. Getting rid of cash gets rid of that risk. They might lose some customers, but losing workers to stress about being robbed is a bigger problem these days.

It also costs money to handle cash. You have to count it at the end of the shift. And store it. And transport it to a bank to deposit it, which takes time ($$) and resources (gas, etc)

I also expect banks charge larger businesses that deal with a lot of cash for the privilege of getting the bank to handle that cash for them.

I get your point, and I do think it's great for many people that we don't lose this outright, but I will offer an alternative view - Where I live, there always were a lot of people who don't report their income fully, which means they mostly transact in cash. We have fairly high and progressive taxes, which means that by transacting in cash, some medium to high earners can lower their tax payments significantly. After trying basically everything over many decades, the clear plan by to government is to make cash transactions obsolete as soon as possible. They've been slowly reducing the maximum legal cash transaction size for a while now, but the goal is clearly to get rid of cash.

While I worry about people without access to banking (mostly people without documentation, but also the poor), I think they're on a course to resolve that too, and I for one would be very happy to not have to pay that much in taxes while seeing others cheat the system and reap the benefits...