What are you even talking about? The context is that cash is inconvenient and costly to deal with. You said "So is taking out the trash. But are you going to complain about the janitor who gets paid to do it?"
To which I basically responded yes - wouldn't you opt out of paying the janitor if you didn't have to? i.e. reduce the cost of doing business - if we're not making trash we don't need to pay someone to take it out. Hey, let's not make trash!
Your response doesn't make any sense in that context.
> those risks (of accepting cards) mean that I disagree with the implied statement that not accepting cash removes burdens
It's not implied, it's flat-out stated. Taking cash involves a variety of extra costs, risks and infrastructure. If you don't take cash you don't need a cash till, you probably don't need a safe, you don't need to pay staff to count and reconcile it, you don't need to get it to the bank safely, or pay banking fees.
If you're going to take cards all you really need these days is a smartphone and a reader.
> It simply shifted the burden elsewhere (onto the customer).
So? We're talking about burdens on the business. If you feel that having to use a card in an unacceptable burden, then perhaps you don't use that business.
By the sounds of it, not many people feel this way. And it's quite funny in itself - given that it's far easier not to bother with cash as an individual too.