Well, there’s a fee for using those ATMs, though my credit union reimburses (up to a certain amount). So, it does work and did work for many years before I met my wife. I’d get cash back at the grocery store, usually, and avoid the ATM fee issue. There might be local ATMs that are free, but I doubt it. I haven’t looked.

I was thinking larger sums of money, though. Recently I had my eye on a used bicycle for sale locally, and the seller wanted cash. I ended up not doing it, but getting $2500 in cash wasn’t going to be easy with the credit union. The local bank would have been much easier, just drop in (during their open hours) and do a withdraw. It’s a rare situation, but that’s the kind of thing that comes up.

Similarly, before mobile deposit, I had to mail them checks to deposit, with all the delays and risks associated with that.

Your solution works, but you have to watch the minimums. I’m pretty sure my wife’s account has a minimum balance (which may be $500, I don’t remember), and some banks require you to have direct deposit set up or you have to pay a fee for the account.