It's indeed somewhat inconvenient to avoid banks completely. For years I didn't need a credit card because I didn't use air travel (railroads are anonymous and accept cash) and stayed mostly in Canada where there's no restriction on how much cash I can carry. If a merchant wouldn't accept cash, I'd take my business elsewhere. I got my first credit card years ago because I got a free t-shirt at the ballpark for applying. It turned out to be necessary for buying my first airline ticket in decades. I also realized it was a way to cross borders  with more than $10kUSD by trickle depositing cash into my credit card until I had a large enough credit in my account to cover my foreign cash needs. Luckily very few people in Mexico use banks or have bank accounts. Cash rules.

I didn't get a bank account until much more recently when I needed one to accumulate millions of dollars to buy real estate. Now I use it for all government-reportable (tax deductible) payments and use cash for everything else. I use it for large not small amounts of fiat. I haven't received a salary or wages in almost half a century and I don't care if shops accept Bitcoin or not. As long as they accept cash, they'll get my business.

I gave up my season's Blue Jay tickets partially because they stopped accepting cash, even for beer. I used to buy my season tickets by meeting my customer service rep at the box office to take my cash. Now everybody, season ticket holders included, has to use a mobile phone to be scanned at the gates, no more anonymous tickets. The last thing I want to take to the ballpark is a telephone. The team and stadium owner just happens to be in the cellphone service business. Conflict of interest much?

Yes, bank avoidance can be a little inconvenient at times but to me it's worth it.